Savage FTW, I've owned the same MGT 8.0 twice, and regretted it both times.
Besides poor parts support, it breaks almost everytime I drive it.
(I think Shark got one of the good ones lol)
However it's a freaking blast when it isn't broken!
HPI Savage gets my vote because of durability and parts support, Savage XL has Bulletproof diffs now, you get a one year warranty with XL and I believe 2 years with the X, HPI has one of the best customer services in the industry.
If you don't mind breaking things constantly, and waiting for parts, MGT 8.0 is an absolute blast to drive!
Savage XL FTW.