If you love CPMA I cannot recommend Reflex enough. To me no game has truly captured the spirit of the arena shooter in the same way. It really feels like the developers have their heart in the right place with a laser-like focus on the gameplay and difficulty curve that made me fall in love with Q3 in the first place.
What's the difference? I remember Quake Live as being Q3A with matchmaking, though I've only played a tiny bit of it.
Q3 had lots of mods and different types of player run servers. Quake Live also got 'balance' changes that Q3 didn't get (like changes to LG/Rail damage)
Wasn't Quake Live just a recompiled Q3:TA anyway?
yes initially then they started balancing and tweaking stuff.