My deal with the XMC-1 is that it will be obsolete by the time it is finished. Marantz, Denon, etc. have a lot more resources to dump into creating a prepro. Something like the Marantz AV8801 is going to have a lot more features than the XMC-1, mainly support for an industry-standard room correction, like Audyssey, and more than 7.x channels along with their processing modes. If your cable runs are short like mine, less than three feet, then balanced connections between prepro and amp won't matter. A decent receiver with preamp outs will probably work just as well as the XMC-1 and amps. You'll have a much better selection if you choose a receiver with preamp outs over a prepro.
I'm not dogging Emotiva. I have an XPR-5, Airmotiv 5's, and plan on buying the Stealth 8's along with a UMC-200, DC-1, or Pre-1. They just have a poor track record as far as processors go because they don't have the resources to do a lot of complex R&D. Receivers, Preamps, and Processors are the most challenging products to develop. You have to orchestrate handfuls of electronics from different manufacturers and bang out a million lines of code in order to make it all work.
Denon AVR X7200WA, Emotiva XPR-5, Emotiva XPA-7, Sony XBR 75" 850C, Oppo BDP-103D, Roku 4.
DefTech BP7000SC (L/R), CLR3000 (C), SM55 (FH), UIW BPZ/A (SB), UIW 75 (TM).
JBL L7 (Sur), EoSone RSR 350 (RH).
PC 2.1 setup. Emotiva Stealth 6, SVS SB2000 sub, Emotiva DC-1 DAC.