Since you have a ps4 pro, i'd reccomend getting a vita provided you have a strong internet connection wherever you go. I assume you realise that i'm referring to the remote play feature. In that way, you can play your newer ps4 games that don't exist for the vita on-the-go. And as you've pointed out, it's also an excellent emulator in which you can play most games from ps1, ps2, ps3 to even psp games on the vita. All in all, i think that it's a great device for your situation since you're already in the playstation ecosystem. Not to mention, the prices are at an all time low now and my guess is that it's bound to rise.