Ignoring price (since we don't have a PSP2 price yet), they're both pretty appealing.
I love the DS and I assume the 3DS would be just that much cooler. I think 3D with glasses is a massive waste of time and money but glassesless 3D? yes please! Add to that an already impressive list of games I would love to play on the go and the 3DS is awesome.
As for the PSP, I think they're neat but I have no reason to get one. The PSP2 on the other hand, is pretty cool. The back touchpad alone has a lot of potential and it just sounds all around slick. While the 3D gimmick might ware thin on me, I think the PSP2 could do a little better. The only troubling thing is the launch lineup-- they're almost all games I can already find on my PS3, just smaller and probably for the same or close price. For my handhelds I want the extremely casual games I just pick up and play for 5 minutes or 5 hours (Tetris and Brain Age are perfect examples).
Again, ignoring price, I'm a little more excited about the PSP2. While I love almost every 3DS game announced, I already have a DS, I don't have a handheld with a touchpad on the back.
If they release at the same price and stay around the same price most of their lifetime, I'll probably get a PSP2. If the 3DS is consistently cheaper than the PSP2, I'll get a 3DS when they start dropping in price.
Also, the other thing that worries me about the PSP2 is I'm sure Sony will release a yearly revision of it while the 3DS shouldn't see nearly as many.
Whatever the case though, I'm not paying more than $200 for a handheld so it's going to be a while before I get either one. Consoles cost $200 at this point in the generation, the handhelds shouldn't cost more.
