In '05 I did a motor makeover on my Evo and went to SE heads (automatic compression increase to 9.5:1), Andrews EV27 cam, and assorted SE ignition components. There's a world of cams out there for Evo motors so read a lot of opinions and think about your riding style. There's a really good book out called "101 Performance Projects for Harley Davidson Evolution Big Twins and Sportsters". It has several pages of charts comparing data for camshafts. You might also look at the nightrider.com website for good test results on camshafts. Specifically the section on cams:
http://www.nightrider.com/biketech/evocams.htmI finally settled on the EV27 for the RPM range (about 2k to 6000). A lot of folks talk about the increased valve train noise but I was also told that it is essential to remove the Andrews-provided cam gear and press on the original HD gear from the old cam. The Tech doing my engine knew to do this and I got no increase in valve noise. Actually, with the then-new SE lifters going in as well, my motor was a bit quieter than when stock.
I could have put a considerably more aggressive grind cam in there but I didn't want the bike to be fiddly or hard to start. The lift of the 27 probably doesn't maximize the potential of the cylinder heads, but I was willing to accept that in the name of reliability and trouble-free operation.
The resulting mods really transformed my bike and made it much more fun to ride. No need to run it hard because it produces so much more power and torque than before.