I am thinking of getting a sherbourne 7/2100 amp to mate with my h/k 525. In the future (1-2 years) I will be getting a dedicated pre/pro for the sherbourne. My question is it best to match pre/pros' and amps of the same brand (such as getting all the same brand speakers in a surround system) or would it be fine to mix a different brand pre/pro with my sherbourne amp? I also have a little more to spend on the amp then I thought. I now have about $3500.00 to spend for a 7 channel amp. What would be some recomendations for a 7 channel amp in this price range? Should I still go with the sherbourne at this price point?