That does look cool, now if someone would just build a kit like that in 1/5 scale I'd be all over it. Still, 1/8 might be nice, but at 6 lbs I think you'd have to have a serious brushless system in there, not just one of the lower end ones. Oh and add some 3c lipos...maybe 4c???
Hum? it could be fun...but I can see it costing as much as a decent used car by the time you did it right.