I've never been much of a Losi FanBoy ;-) If I were in the market, I would look at them in this order (depending on your budget)
Xray 808, Mugen MBX6, Hot Bodies D8, Losi 8ight, Associated RC8.
This is of course MY opinions. They are all great buggies. The D8 is an AWESOME buggy for a great price too. I had the pleasure of driving one a few weeks back. It was Niiiiice. I personally run an Xray 808 e-conversion and I love it.