You might want to buy that vice.
I wouldn't bother with it for PSP stuff (there probably are ways of fiddling with it to make it work better but there's little point in me bothering, I literally already have an actual PSP) and I haven't tried too much Dreamcast wise (never an easy platform to emulate by all accounts, just because of how the original was built), but if you're interested in a low-cost portable way of playing loads of 80s/90s/early 2000s games, it's great.