I am narrowing in on the B&K Components AVR507 which is has Dolby Digital®, Dolby Digital EX®, DPLII®, THX Ultra2®, DTS®, DTS-ES®, DTS etc. It does not have DPLIIx. I have a seven speaker setup. Would I be better off with a receiver that does have DPLIIx or will the Ultra2 music and movie modes do a good job on all seven channels. I would like to use all seven all the time.
