Which Motor and ESC

I'm looking at getting Feigao 8xl and a quark esc. Do I need to get the 125 or will the 80 and the 65 work too? I'm trying to do this on a relatively tight budget and would prefer the cheaper esc if it will be reliable and able to take the power of 14 cells. (GP3300) I would rather spend my money on the more expensive one then get one that won't preform well in my Revo.

I'm putting this in a Revo with an E-Maxx tranny. Is the tranny pretty solid or are there some upgrades that I would have to make? Thanks for any replies. :)