Hello, I want to share something with the music community.  I have been using the stock 2.6.38.4 kernel with the "ck" patch and have had nothing but great results with it.  No X-runs or anything.  If anyone is interested, feel free to ask me some questions about it.  If you are on Fedora 15 it might be a good options since I don't think CCRMA has a rt-kernel for Fedora 15 yet.  I can tell you how I went about installing the patched kernel if you need.  The patch also is said to speed up basic responsiveness, but this subject is up for debate.  

Cheers everyone,

Bill