Good tube testers are expensive. What you *really* want if you are going to spend any money on a tube tester is "mutual conductance". Also look at the tube sockets, older machines can't test newer tubes. Watch fleabay, eventually bargains come along.
Having said that, *any* tube tester will do what you need here. Heck, you dont even need a tube tester. You can just check the filaments for continuity with your DVM. An RCA tube manual will tell you which pins are the filament. If you don't have one yet, post which tube numbers you have, and I'll post which pins are the filaments.
Good luck.
jc