Okay, it was late in the day when I wrote my question. My center channel is indeed an R*C*7. Actually, I guess I could blame it on a *typo* as the C is just below the F (unless of course you are using a DVORAK keyboard).
So, my ultimate plan is go to with RF7s in the front. However, it is going to be extremely difficult (if not impossible) to pry my Heresys out of my hands. I have had those speakers for 20 years. They are in mint condition (hand rubbed oil by me and not a blemish on them). Furthermore, I would kick the wife out before I would see my Heresys go out the door. Therefore, I have a delema - what to do with the love of my life in order to add 2 RF7s to my life. So for now I'm just strugling with surround speakers and whether the RS7s are worth the dramatic jump in price over the RS5s.