Well I finally converted my main server to full time suphp. Ive really experimented with page loads on each and they were about the same. Today I thought I saw a drop but was just my pc after upgrading ubuntu dns was a lil funny.
Anyway, the benefits of running suexec far outweigh any con. Which the only con I can think of but thats just how it has to be but if someone gets a shell on a clients site thru php script they will have full rights to their files and can delete and move anything they want. Now they can do this on nobody too but unless the files are world writable they cant. But for the overall server its the way to go.