Looking for help with motor, ESC and lipo setup

[TiTu]

Hi

I'm starting to build a twin cat, but I'm a bit lost with motor, ESC and lipo setups.
What I'm looking for is long run times and decent speed (for me, I think around 40mph is enough, at least for now ).

That being said, first thought was getting 2 either Feigao 540 10, 11 or 12L or Feigao 540 8, 9 or 10XL for motors, 2 Turnigy Marine 120A ESCs and for lipos either 3s or 4s, depending from motors and as much mAhs as possible.
About the hull and hardware, I'll be using MHZ's 33" Mystic C5000 with Octura's x442/r. If needed, I might get different propshafts to be able to use smaller props with 4mm hole.

So please enlighten me, give criticism and ideas where to head so I won't end up buying stuff I don't need to as I'm trying to keep this sort of low budget project for now.

[Make-a-Wake]

For 40mph 540L's would be plenty.............probably can get away with 540S's.

A couple of 13L or 14L's on 4s would be a good choice IMO, run them on a couple of 4s 5000's.

These 5000 30c's will provide ample juice: http://www.hobbyking.com/hobbyking/s...idProduct=8588