I was planning (eventually) on getting the Synergy BE deluxe module (and another SYN 2, and the updated Soldano module if and when it ever comes out). Still will get the Soldano eventually, but thinking of this instead of the SYN 2 and BE deluxe module. I'll miss the HB switch, but gain a clean/plexi channel out of the deal, and save a lot of money at $499. Plus a lighter easier setup at the cost of one extra module slot.
In the Tone Talk, Dave mentioned hooking the IR-X up with a SYN2 with the IR-X as the external "amp" as far as connections go (without power amp obviously) . I can see how this would work really well.