I've owned and raced many different buggies.....
1st things 1st - Any pro racing buggy on the market would be a good choice. They are all good.
I have only a couple things that stick out with certain buggies:
1. Mugen hands down has the best parts quality.
2. The Losi can be rough on throttle servos if not set up properly.
3. The Losi front end gets sloppy quick, though it does not seems to affect performance.
4. The Losi is very responsive to tuning changes.
5. The Jammin is a very solid buggy and I'm told is awesome with the new shocks. Only downside here is that they're gonna have a new buggy out next year sometime.
6. The Losi shocks are sweet.
7. The RC8 works great out of the box and seems to be a well built buggy. (I just got it and only raced it once.)
8. The RC8 is very stable and has all the steering you could ask for.
My Video (1st Time out):
www.youtube.com/watch?v=a5gFoPM3QZI