You should also check out the F5D stuff (electric pylon). I'm running apc props up to around 40k.
My Excite F5D is turning apc 4.75x4.75 clipped down to just under 4.5 dia at about 39500 or so. Motor pulls a little over 100A and the batttery (8 cell IB3800 or 10 cell GP2200) is good for only about 2 minutes.
The F5D airframes are pretty low drag and sized only big enough for the competition rules for wing loading. I'm not sure, but I don't think they are running up at 200mph during the races. Perhaps with a high pitch prop and a HUGH dive, they might break the 200 mark.
You might try the High Performance Forum at RCGroups.com They have some sicko's trying to stuff 3 KW of power into gliders
