I will be replacing my 20 year old B&W DM 310s with Sierra 1s. The metallic tweeter is just too much.

I'm currently driving them with a Marantz SR-7000 with 135 wpc in two channel.

I will be replacing the receiver as well.

I am currently looking at the following: Anthem MRX 300, Anthem MRX 500, Marantz SR 7007, Marantz SR 6007, Outlaw 975/7075 Combo and NAD T 757.

What do you guys think is the best way to power the Sierra's?

H