What will you be using it for? For gaming, you should definitely get the fastest videocard available - Radeon Mobility 7500. It spanks GeForce2Go's bare buttocks with a hair brush!
Dell sells those.
If it's not something I can fix myself (e.g. any desktop PC), I would buy it from a very reliable manufacturer (e.g. Dell) so that they can fix it if it breaks (e.g. I drop it

) Don't forget that Dell constantly releases new drivers for various OSs for the videocards, soundcards and other hardware used in their laptops. Can you say the same about this particular mWave laptop?
I would actually get an Athlon 4 with a Rad.Mob.7500 - but I don't know if anyone makes them like that.