Another thing to consider, while the hyper 8 is definatley not RTR. Its not a 'kit' kit either. If you want to build one ground up, put it all together, and then pick a pipe engine, etc......go with the losi.
or there's the 8ight RTR which comes with a spektrum radio.
from what i've seen of the 2 at our club racing & our state title round last year i'd go with the losi. it's more durable, parts quality is top notch & it is a racer. the hyper is aimed at the lower - mid end, if you aren't going to do serious racing and you're on a tighter budget get the hyper.
in the end you do get what you pay for.