Oh, and in terms of trying to answer the question, I think the PSP is nearing the end of it's life. The 3DS is pretty new, however it hasn't been a big success. I don't think the PSP was ever that big a success either.
Whether the machines are a success or not matters because if they are not a success, no one will bother writing games for them (for you to pirate).
There is a new PSP coming out in Feburary apparently:
http://en.wikipedia.org/wiki/PlayStation_Vita.
I think you've already noticed the main problem with this category- it's pretty much been killed off by Android or iPhone games on phones or tablets.