So about ten days ago I bought a new PSP SLIM (Darth Vader White Model). I was bored and had some store credit at FYE. Well after some playtime with Guitaroo Man I came away very impressed by the new model.
I know some people complain that it's flimsy and cheap feeling now, but I disagree. Aside from the new UMD door, (I'm more than sure it will break later on) I like the PSP Slim. The buttons are all laid out pretty well, except for the Analog Nub, my thumb starts to cramp after about 20-30 minutes. It's new design is not earth shattering but I like what Sony is doing with the Interface and the Ability to hook it up with my PS3 is pretty nice. I also got the Component Cables for the TV Out option and it looks pretty nice on my HDTV. It's just that games do not take up the full screen. Not a huge problem but if you have a smaller TV, it just doesn't make sense.
Yes I have custom firmware on it but I'm not going into details. I'll just say that it makes this little machine even better.
So I would recommend buying a PSP Slim. Just get some Custom Firmware on it so you can play some Double Dribble.