Well, here's the way I see it; unless I find it's significantly better or circumstances justify it, then I never ever "upgrade" my gaming systems (both handheld and consoles). Besides obvious ones like upgrading to my PS to PS2 to PS3, the only time I can really think of that I upgraded my consoles was with my DS to DS Lite, but I only did it because one of the shoulder buttons no longer worked properly (which was a vital button in a good portion of the games I play). That was all.
And since I'm seeing no real significant or obvious improvements, I just see no reason to upgrade unless my PSP, for whatever reason, crapped out or part of it just doesn't work anymore.
_________________ The Local Video Gaming Lunatic
Recent stuff I'm into:
Watching: A Certain Scientific Railgun (ep.14, stalled), Hoshi no Kirby (ep. 71, stalled), Nazo No Kanojo X (ep. 8), Acchi Kocchi (ep. 8)
Reading: nothing