Looking at the list, a few really interest me:

http://www.apcprop.com/cgi-bin/store...c=6a&product=+

The 5.5x2.5 sounds like a good reedy prop and it's only $1.83. It will certainly unload a little better than the 5.7x3 in flight.
The 4.5x3.5 would be interesting to try on an AME .061, I think.