which snes controller?

i've been trying to figure out which one to buy for snes emulation.
this one http://store.videogamecentral.com/usb-retrobit-snes-pc-controller.html is supposed to be plug and play, but i don't know actually how good it is.
Another choice would be to buy an actual snes controller http://www.amazon.com/Nintendo-sns-102-Super-Controller/dp/B000035Y6C/ref=pd_bbs_3?ie=UTF8&s=videogames&qid=1215456199&sr=8-3
and buy an adapter like this
http://www.amazon.com/SNES-RetroPort-controller-USB-adapter/dp/B000UEB61S/ref=pd_bbs_sr_1?ie=UTF8&s=videogames&qid=1215456199&sr=8-1
Which one's probably better?

You can get an snes pad for dirt cheep and an adapter for 10-20 bucks.

Or you could make one for 10 bucks, if you have the skils.