What should I rather get a psp 3000, ipod touch 4g, or a nintendo ds lite?

my birthdays coming up and i really want a kick a** device just for the fact that i only have a ps2 and an ipod touch 2g. I really love playstation and all of their games and counsels. but i also love apple. i have never owned a nintendo device before so im not used to it. and before u awnser i only got as much money to get an ipod 8gb. i want the psp cause well there games ar sick. they ar way more serious then the nintendo ds. Now that i already have a 2g ipod touch the only thing im intersted in the 4g is the 2 camreas but thats why i really want cause i take lots of pics and vids. This is really hard to decide cause i love the psps games but since the ipod has 2 camreas its hard to not take it. Please Guys I REALLY NEED UR HELP ON THIS!!!!!!!!!!!!!!!!!!! THANK U. and just for the record i think that the ds is out of this picture lol.