I would not buy the Go for the following reasons:

1) Does not use memory stick, instead you must download your games (once you fill your memory with games, you must delete them to download new ones).

2) Screen is smaller.

3) Cannot play older UMD games that you have already bought.

4) Not enough new features to balance out the negatives of the new console.

Overall the PSP Go is not user friendly. It looks shiny and new but they have tried too hard to protect it from CFW that they took out many crucial details to make the new system work well.