PS2 if you are Home most of the time and older titles are cheaper of course.

PS2 has alot more games compare tp PSP.

PSP if you play *Ahem Firmware, you know what i mean, and if you liek to play around the PSP flash or Homebrews.

Why the hack you wanna buy a PSP for Shooter games?

There's only few games that are worth for shooters like MGS:POs, Syphon Filter and Killzone.

Tales Of The World, why?

Customise of own Hero appearance.

Can level up to 255 which may take tons of hours.

Create Weapons and etc.

FF: Dissidia

FFVII: Crisis Core

Crazy Taxi: Fare Wars

Monster Hunter Portable 2

im going to buy a psp soon, and does anyone know some good rpg games for it?

im planning to go on some roadtrips so i need to be able to kill some time.

Mrnam

Wait for games like Brave Stroy, Tales of the World or Riviera.

Currently only nice RPG for PSP is Tales of Eternia and nothing else, you may try the of Anniversary Edition FFI and II.