Hyper 10sc brushless motor dilemma...

[hootie7159]

Ok...quick question to all you hyper 10sc owners and/or brushless experts....I want a setup that runs cool and will give me the longest runtimes...I've already decided to get the mmp...all I need to get is the motor...I have a bunch of these 2s 30C 5200mah lipos and I can't decide Which motor to run...either the HV novak 4.5 (5000kv) or the HV novak 5.5 (3700kv...I think)....I know low kv high voltage is the best but I really want to stay running 2s lipos....will the 4.5 be too hot? If I get the 5.5, will I be able to gear it up without overworking the lipos?....really only shooting for 35-40mph but Id rather pick torque over top end speed...why do you guys think?