The B&K AVR 507 is one great sounding HT receiver. Not many offerings today can top it's musical prowess. The Onkyo 818 with XT32 can probably get you pretty close but will not be as "warmish" as the B&K but pretty close to neutral, the way I like it. AVR's from NAD, Anthem, Arcam, Cambridge Audio, will also rank up there with the B&K for music.
Bill
Bill