The Savage XL and MGT 8.0 have dubious engines. Not so with the Losi XXL -which comes with an LRP Spec 3 twin, and will probably be the fastest RTR offroader you can get... Losi also has better quality than the others IMO too.. Pricier, but you get a Spektrum 2.4GhZ radio, good engine, huge shocks, FAR better handling than the others, etc..