As far as I am concerned there is nothing in the RCS 140 class.
The one I have is idling at 1800rpm's with at top rpm of 8600 with an APC 16x8.
This motor has less the 1/2 gallon of fuel through it, no where near broke in yet.
Best place to get one on line is RCS showcase at the below link.
Mike and the other people there are GREAT to work with, no question goes unanswered.
Link to RCS showcase:
http://www.rcshowcase.com/