1) nah, just go for it
2) yes
3) it like 1 inch wider, and 2 times higher
4a) no you dont, but youll suck at online games cuz you would be able to see other player good (shooters), i bought a 22" PC screen with HDMI with it
4b) yes it does, its like the same as the wii, you got that 3 colour...