Curious to see what ppl suggest here... You have pretty limiting constraints... 10 cells isn't really very much - approx 3s lipo voltage (but with less performance).
60a is probably over-rated and hence not much to work with... Agree 110% if you're on a budget to build or get a el cheapo battery tray (note a broken rustler or stampede chassis works well - for postage I think I can get you one for free).
I would "invest" in an rcm motor mount....
http://www.rc-monster.com/proddetail...=LSPmotormount
I would suggest something with a higher KV in the 3000+ kv range and gear down. Guessing your budget you could try an AMMO or a used feigao L can.
http://www3.towerhobbies.com/cgi-bin...&I=LXLWZ7&P=SM 50mm 3300KV
http://www3.towerhobbies.com/cgi-bin...&I=LXLXA0&P=SM 56mm 2600KV
PS LSP's work ok with rotated diffs and you could run twin packs at the rear
PPS what is the full spec of the esc?