DS Phat, DS Lite, or DSi?

[Hawkeye]

I think phat is best for GBA. It is the same brightness GBA was designed for, the carts actually fit, and phat has the best D-pad.
DS lite is pretty great for mario kart ds and tetris ds...
DSi I don't know, looks like a rip-off to me though... no way am I buying a 3rd DS...