3DS is a no brainer for me. I'll get it because of the sheer number of DS games i've got. A true 3D picross will make my mind asplode.
I neglect my PSP, so i'm not quite as antsy about the NGP/PSP2 and though some of the features (the rear touchpad in particular) if done right could be great I've got a feeling that many of the games are going to be gimicky and thats not a good thing, just like the Wii.
It'll be at least 300. A 3G one will probably be closer to 400.
They've still not said much about the game medium. Are we going to be spending 40-60 bucks for DLC, or some kind of SD card. If its DLC, there is no way i'm spending that on the games and i'll probably pass on the system completely.
I also think that they've gone away from the PSP2 name because it'll make people think that their PSP games will work with it and we know how that helped kill the PSPgo. A new name = new games.