[quote name='whoknows']There really isn't much that isn't available digitally that I would really want, so the Go worked for me.
I'd take a look at PSN if I were you to see if there really is anything you really want that's not available.[/QUOTE]
I am not certain what games weren't available digitally, but I know there were a few (like that recent Kingdom Hearts: Birth by Sleep). Also, I am pretty sure there were a lot of older games that weren't going to be released digitally.
I've proposed this several times in the PS Blog suggestion page, but it always gets denied, but I think Sony should make an adapter that converts the memory stick slot to a regular SD card slot (like those SD micro cards that have that adapter). Then, they can start releasing games only on SD or digital. That way, both the Go and the older PSPs would be compatible with the physical media; so those of us who like retail packaging and physical media can have the best of both worlds.
For me, I just got the PSP God of War LE one for $199 b/c I have never owned a PSP before, and I want to be able to play any game that ever came out, because I've missed all of the games on the PSP to date...