What's better the GPX2 or the Dingoo?

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Recently I've found out about these two handhelds, which can emulate every 16bit console up to the NeoGeo.
Which of those two is generally better? As far as I know the latest version of the GPX2 is called "WIZ" and for the D?ngoo it's "A320"
Are there even other notable handhelds besides that Pandora thingy that hasn't been released yet?

Accidently I've stumble upon this offer:

http://www.chinavasion.com/product_i...nment-station/

62.42 ? (81.69 $) doens't sound that much for a Dingoo A320, anyone got experience with this shop? Never heard of chinavasion.

[FatTrucker]

Nah they sound well dodgy to me. The sort of thing people would advertise by spam. I would steer well clear.