2wd is a blast, definitely pick one up. As everyone mentioned, it really improves your driving abilities.
As for which to get, whatever your local shops carry parts wise is a good way to choose. They all are great trucks and don't let any of the "keyboard pros" fool you, they all can win races if you know how to drive. Its 95 percent driver, 5 percent truck. I've seen slashes with stock suspension lap modded sc10's, blitzs, etc and vice versa. I've driven aand raced slashes, blitz, and sc10's and any of them is a solid choice! (Never tried a kyosho but heard good things).