Which REL sub, R528 or B2


I'm planning to buy a REL subwoofer. It will be used in audio system mainly, but also in HT from time to time. I listen to jazz, vocals, occasionally rock. It will support Dynaudio C1. I'm considering the new R528 or B2 ( can get them at roughly the same price).
The new 528 looks better but is it as good as B2?
jkuc
I don't get calibration systems except for the "gear adjustment challenged" listeners. I may have some advantage as a long time musician and concert sound tech (although among audio geeks that seems doubtful), but I trust my ears and other than my REL adjustment knobs I don't have any EQ on my preamp anyway (other than bass level tweaking I don't need any). Recordings have an infinite range of mixing results and sometimes the bass is way too loud, thus requiring my only EQ move which is to turn the sub down a little from time to time. Does anybody else do that? If not, why not? Do you surrender the control to a calibration system? Are we not men?
Wolf garcia, apparently you don't have idea what you are talking about. you are the man. that's for sure.
Jkuc...please explain...no wait...please don't explain as I somehow doubt I'd understand...really...thanks.
All great points. The act of disappearing in one's system, is REL's best asset.