I would use S&R if i would like to go to 8000 rpms, in fact i readed that stock S&R would fail after 7700 rpms.
Im going to use those cams on my car and i think that with a real good CR i would be able to get nice hp at 8000rpms so... IMO put the S&R they would help you get reliability...
I don't have a dyno sheet, but IIRC the final number was 150 or 151 on the Dyno Dynamics "heartbreaker". I can say that it feels about the same on the bottom end and absolutely comes alive about 4700-5000 and pulls strong to past 7k. More seat of the pants feedback to follow tonight. Hitting the road in a couple minutes.