Well, that a good question....lots of options. What do you want to do with it bash or race? You want a drop-in or a conversion?
Here a link to a poll that was done
http://www.rcuniverse.com/forum/m_57...tm.htm#5781778
There is also the Picco P3 .28 and Axial just came out with the RR series in .28 & .32 and then there is the high end stuff NovaRossi, etc.
I'm sure the Big Blocker will be adding to your post soon.
Should be fun post to follow.