Paraneer,
You're absolutely right: it is a bit overkill getting an extra pre-amp, which is what I'd be getting with two Marantz PM15S2's. I would prefer a power amp/integrated, but Marantz is not offering that option.
That's what I currently do: I bi-amp my Arcam Alpha 9 integrated with my Alpha 9 power amp.
Yes, I'm a big Arcam fan; I'm waiting to see what comes next: the A38/P38 is now several years old, and Arcam tells me they are coming out with something new soon.
I also own Marantz, and do really like the Marantz sound; the PM15S2 is on sale right now, so it's making me take a serious look at this.
My budget is roughly $4,000, and I keep saving up. I'm open to all suggestions about the best combination I can get to bi-amp with my B&W's.
Thanks again,
Jeff