I would go with the 9XL and 4s lipo combo. To tame wheelie's or get rid of them all together do the following....
Run the 3.3 extended chassis on your revo.
Use high gearing
Use a some what loose slipper clutch setting
Reduce punch or startup on your esc to tame power from a stand still
Use a techno RC eletric clutch on your motor instead of a pinion
Move your battery as far forward as possible
BTW the zippy-H lipo's are nice, the zippy-R lipo's are even nicer for just a few bucks more but they are long & skinny packs so make sure they will fit on your truck. The zippy-H are normal length packs though.
SuicideNeil, up in post #3 you said that the 1600kv Medusa is a little slow for 5s. When i put it in BrianG's calculator I get 29600RPM. The other combination that is getting a lot of recommendations is the 9XL on 4s which works out to 27400RPM.
The calculator shows the Medusa having 1 more mph over the 9XL.
Can you help me understand your statement?
Is it a torque thing? Is it becuz the Medusas are rated at 60k RPM?
If i bump up to 6s on the Medusa I get 35500RPM. Wont that cause a lot more heat or is that going to be more efficient?