Well...
Bill, I hear you...
At my old house, my Heritage II coped with my wall to wall berber very well. The house that I am in now has hard flooring, with area rugs. The Heritage works really well on the rugs in the den and bedroom, but I have found that the Eureka Boss Smart Vac does best on the rug in the receiving room and parlor. The Smart Vac is too aggressive for the rug in the dining room, so that rug is vacuumed with the Hoover Convertible. Sounds like a lot of work, but I get the best results that way.
Thank goodness I have a few different vacs to use! I wish you luck.
Joe