Here are a few threads that you might want to read. I have a 27% and I love it. It seems like there is some sort of balance or wing loading issue with the 24% that has to be dealt with. I can't remember exactly what the deal was.

http://www.rcuniverse.com/forum/m_77.../tm.htm#774251

http://www.rcuniverse.com/forum/m_99.../tm.htm#994193

http://www.rcuniverse.com/forum/tm.asp?m=1077535

Mike