Hi! Assuming your Poker is ANSI and not ISO, almost all cap sets will be compatible, barring some vintage ones and maybe some sets made for winkeyless boards. It really depends what you like.
There's a lot of love for Cherry profile caps around here, and SA caps from Signature Plastics seem to have become a lot more popular recently as well. I'd check keypuller to learn about what's out there, and then check out the GB / IC subforums to keep an eye out for anything else you might like. Happy hunting :v