Thanks for the all the replies.
The pricing here in the Uk is quite a bit different to the US. The MBX6 is some £150 more expensive. There also happends to be a 2 race old 808 with all the hop ups, which is quite a bit cheaper than buying a new one. Cost is important, espiecially when I can get a new engine with the money I save !
The problem I'm having that there are a lot of different cars that run at my local tracks. The 808 does seem very reliable, with some of the other cars dropping out.