Cheetahs are with out a doubt the new budget top end kings. But for 75% of the riders out there, they are probably not the best choice. They will be fast, There's no way to even argue that.
Like Loco said, for what you are looking for a basic low/mid port job would be your best choice.
For the best woods motor you can build cheaply, I will say again that a set of RZ jugs can't be beat. Add a little more stroke to it and it pulls hard everywhere.