A long lasting gaming and multipurpose rig?

This seem like a decent rig to play most current and forthcoming PC games? . . . .

Budget - Within about $1500 (American)
Resolution - At first 1680 x 1050 - Eventually HD (and a dual monitor setup)
Games / Settings Desired: Everything from DOS era on, yes you read that correctly. Most should probably be high settings (if not ultra)
Any other intensive software or special things you do (Frequent video encoding, 3D modeling, etc) - Folding at home (may run in background) - no Video editing, no modeling
Country - USA
Parts that can be reused: Not that I can think of (see current specs as to why)
Buying Parts: Before the end of the year, hopefully before fall or end of summer
Will NOT prebuilt

Part list permalink: http://pcpartpicker.com/p/6zj0
Part price breakdown by merchant: http://pcpartpicker.com/p/6zj0/by_merchant/
Benchmarks: http://pcpartpicker.com/p/6zj0/benchmarks/

CPU: Intel Core i5-2500K 3.3GHz Quad-Core Processor ($179.99 @ Microcenter)
CPU Cooler: Cooler Master Hyper 212 Plus 76.8 CFM Sleeve Bearing CPU Cooler ($22.99 @ NCIX US)
Motherboard: Asus P8Z68-M Pro Micro ATX LGA1155 Motherboard ($122.99 @ NCIX US)
Memory: G.Skill Ripjaws Z Series 16GB (4 x 4GB) DDR3-1600 Memory ($89.99 @ Newegg)
Hard Drive: OCZ Agility 3 240GB 2.5" Solid State Disk ($219.99 @ NCIX US)
Hard Drive: Corsair Force Series 3 90GB 2.5" Solid State Disk ($92.98 @ NCIX US)
Hard Drive: Seagate Barracuda 2TB 3.5" 7200RPM Internal Hard Drive ($119.99 @ NCIX US)
Video Card: Gigabyte Radeon HD 7870 2GB Video Card ($367.55 @ Newegg)
Case: Corsair 500R White ATX Mid Tower Case ($139.98 @ Newegg)
Power Supply: SeaSonic 650W ATX12V / EPS12V Power Supply ($145.98 @ Newegg)
Optical Drive: LG GH24NS70 OEM DVD/CD Writer ($23.98 @ Newegg)

Total: $1526.41
(Prices include shipping and discounts when available.)
(Generated 2012-04-09 14:33 EDT-0400)

Current specs:

Case: No idea (although it is a HP slimline, gray) - that should give some idea of the sort of case.
Motherboard: Asus A8N-BR (Pyrite) (1 PCI, 2 DDR2 DIMM, Audio, Video, LAN, IEEE-1394)
Motherboard Chipset - nVIDIA GeForce 6150 LE, AMD Hammer
Power Supply: No idea (but it's less than 100 watts, I think)
Processor: DualCore AMD Athlon 64 X2, 2000 MHz (10 x 200) 3800+
CPU Cooler: A fan
Memory:
- DIMM1: Kingston 1 GB DDR2-533 DDR2 SDRAM (5-4-4-12 (at) 266 MHz) (4-4-4-12 (at) 266 MHz) (3-3-3-9 (at) 200 MHz)
- DIMM2: Kingston 2G-UDIMM 2 GB DDR2-667 DDR2 SDRAM (5-5-5-15 (at) 333 MHz) (4-4-4-12 (at) 266 MHz) (3-3-3-9 (at) 200 MHz)
Hard Drive: 250 GB ATA drive
Optical Drive HL-DT-ST DVDRRW GSA-H20L ATA Device (DVD+R9:8x, DVD-R9:4x, DVD+RW:16x/8x, DVD-RW:16x/6x, DVD-RAM:5x, DVD-ROM:16x, CD:48x/32x/48x DVD+RW/DVD-RW/DVD-RAM)
OS: Windows 7 Home Premium 32 bit

And what I wanted in a new system:

Hardware

USB 2.0 speeds that are minimum of 30 MB a second
USB 3.0 speeds that are at lest 300+ MB/s [I will get / use an SSD]
Firewire (and or eSata port) --- because I have a external hardrive that has both along with USB
At lest a solid terabyte (1.5 TB)
Has either a VGA or DVI port (current monitor I have has both)
Also has support for HDMI (for the future monitor)
Multi card reader (although I mainly need SD and Memory Pro Stick Duo)
Able to use a PS3 controller AND A XBOX 360 controller (yes I know 360 is native support . . .)
I would like a quad core.
Multiple internal DVD drives - Also to make installations faster
Plenty of 3.5/5.25 drive bays . . .

Software

Windows 7 Ultimate (64 bit) (Main OS) -- Mostly for languages
Windows 7 Ultimate 32 bit (if needed)
May first run Windows 7 Home Premium 64 bit - as I have both 32/64 bit discs now)
Windows XP (if 64 bit won't run some of the games I have) (if needed)
Folding@home - (although I use my PS3 for that when I'm not using it)

Gaming Software:

- Will use steam:

Elder Scrolls (Morrowind -> Skyrim)
Portal 1 & 2
Batman Arkham (Asylum/City)
Sonic Generations
Quake (all)
Doom (all)
Wolfenstein (3D) & 2009 - and the others
Commander keen (all)
Bioshock (1/2) (perhaps infinite)
L.A. Noire
Bejeweled 2/3
Peggle
Various COD's
anything else that interests me
- Will use CD/DVD's of the games I have:
Warcraft 2 - Tides of Darkness & Beyond the Dark Portal
Warcraft 3 - Reign of Chaos & Frozen Throne
Diablo 1 - 3 (when it comes out)
The Sims 1 - And all expansions
The Sims 2 (probably)
Simcity 4000 & Rushhour
May use emulation (to run up to the PS2/Wii)

Other Thoughts

Eventually a dual monitor setup (and one be HD resolution)
I will wait for some parts (hard drives, GPU, etc) to drop in price.
Will wait for IvyBridge. . . .
I WANT UEFI, NOT regular old BIOS (that this slimline has
May eventually like a dual GPU (crossfire?)

Monitor Thoughts:

First and foremost: Full HD
Widescreen
Supports: HDMI, DVI, Displayport (if the motherboard of the computer does)
Within 1 - 2 MS response time (current monitor is 5 MS response ti
Screen size - 25 to about 27 inches