I have the 204's in our 08' RKC and like them quite well. Pulls nice in the higher gears with light throttle roll ons from 2000 rpm, maybe lower than that but I downshift if the rpm's drop lower than 2000. Pulls real strong from 2,500 to 5,800 when hammering it. Dyno's at 91hp and 101tq with the 204's, SE pushrods, Rush slip on's, SE backplate and K&N filter, TTS Mastertune.
Can't say as I would recommend the SE211's for a late model, higher geared, heavy touring rig. I have the 211's in our 98" 06' Heritage Softail and even with 205ccp those cams don't hit real hard until around 2,800 - 3,000 rpms. When they do come on though they really hit hard. Ear to ear grins ! Dyno's at 108hp and 112tq but not as usable a power band for normal riding as the RKC has with the 204's.