Anthem makes some very good points.
I just purchased a Emotiva xpa-5 through their "Secret Sale". I got a great deal. They may have some Secret Sale product left, give them a call.The secret sale is refurbished goods and overstock. It still comes with same warranty. They have products for both Emotiva and Sherbourn.
The amp sounds fantastic! The Amp is being fed by a Denon 3312 receiver. I'm waiting for the Emotiva XMC-1 to become available. The XPA-5 is powering a pair of Triton 2's, a SuperSat 60c and a pair of SuperSat 3's. Prior to the XPA-5 purchase I was using the amp form the Denon.
I knew there would be a big difference in volume and headroom. What surprised me was a huge difference in imagery and channel separation, in both 2 channel and surround listening.
Your on the right track.Keep us posted on what you decide.

I am going to check the price of XPA-5 and Sherbourn PA 7-150 & take a decision.
On the preamp, I may need a 4k support will wait for XMC-1.
Thanks guys, will keep you posted

If you are wanting the XMC-1 make sure you get on the waiting list now. It does not commit you. when I ordered the XPA-5 they told me that once they launch the XMC-1 there will be a 2 month backlog for people on the end of the list.

MoBrien:

Thanks for the info on the XMC-1. I think it's gonna be a long wait for some people, especially if you haven't placed their order. I hope and pray that when it makes it's world premier all the bugs have been worked out.

I think/hope the long wait for release is so they get all the bugs out. They do not want to revisit the bugs that the UMC-200 had. The good news about Emotiva is that they stood behind the product and worked with everyone until it was correct.