Any of them are fine...This question has been asked a few times on other threads. If you do a search you will find more in depth details.
Novak, LRP, Tekin are all great. They all run fast, you will just need to find the correct gearing. If you have a buddy that runs one, get the same as him so you can compair notes. Because if someone says they are running a 4.00 rollout with a tekin, you will prob have to run a 4.60 with a Novak, or a 4.20 with a different Tekin setup. So the best thing to do is get one that one of the people you race with is familiar with, and they can hook you up with a good baseline setup.
If you have any questions just ask. Most every racer is happy to help out in any way they can.
Joel White