No matter your gonna come across problem games. Some which are just hard to emulate others that will run too slow because of the hardware. Sonic Adventure 2 for example would most likely chug. I would try going for a comparable 2 gig model if possible. There are builds of Reicast that do run on Intel even though I don't think it's officially supported yet so keep that in mind.
I tested a few games out once with an Acer, Intel dual core 1.6, powervr gpu and 1gb ram also and could run Code Veronica without any problems except one and that was the sky in certain areas were...well really weird. Gameplay speed was fine though.
Grandia 2 seemed to run fine as well.
MvsC 2 ran fine with the odd little pause. Think there may be a setting now that helps with that.
Sonic Adventure 2 would randomly and often slow down horribly.
Not much but may give you a better idea what you can play.