The RC8 will be cheaper in the long run. It needs nothing to be competitive.
It has a ton of steering throw, it will turn better than any buggy out there. Jumps nice, and it begs to be driven fast. I am in the buggy market myself. I have driven the Jammin, the 8ight, and a few others. I do a lot of pitting for the buggy guys at my track as well. The RC8 keeps impressing me.
The Violater comes with a non race legal tank and track width. You can adjust the width to race specs easily though.
Both will require a different engine to be race legal though. Your track may not mind the .28s though. We don't worry about it. A good .21 is still faster.
Oh yeah, a sponsored X-ray driver shows up to our races too. That is one slick buggy, i think it is going to better than anything else on the market. Amazingly smooth on the track.