So you ride street? I would venture to say that you might be more happy with the cheetah you mentioned. The serval is far less work but if you are riding in the streets where it is nice and wide open, the serval will be signing off pretty early compared to the cheetah. A cub would be great in open roads if you really have a place that you can get away with riding it. Problem is they are less then stellar on pump fuel like you want to run. Race gas or alky would be another story though. Go with the cheetah. It will be a bit more work, but it will be able to have decent low end, still pull RPM's and do it on pump fuel. So for you, of you have the cash it is the way to go.