I also have the CR 575 and for my build, they are exactly what I was looking for. If you got to the tech forum under dyno sheets you can find some sheets on them. Sheffer performance uses a lot of them and post a lot of sheets using the CR cams.
Are you going to do anything else to the motor? If so, those things should be considered. Lots of great sheets on the 570-2 cams in 103's.
Talk to Darren at Sheffer and see what his thoughts are and if the 575's will work for you. I did and I am 100% satisfied with them.
2009 Road Glide. 16 in Vindikta Wild Cats. Aquatic AV, Stinger 700X4 to MMats PA 601, Audiopipe horns.
Ground Zero 7X10 in the lids w/ sspn.4 1000d, tuned with DD Audio DSI-2. S&S 106, lifters, push rods and AC. Drago 2. CycleRama 575. Progressive monotones -1in. 12in. HD adjustable rear shocks. Painted inner fairing. Tuned with TTS. Blacked out!