I'm jealous DW -- I haven't even been able to check out DominATP.. :sad:
While this looks like a great product, it's not quite on Xtend or PurpleWraath level (or Core ABC). I agree with you about the need to look further into this when you cut cals/carbs more, but a couple points:
Xtend is a balanced BCAA blend, bringing in the other two BC's valine & isoleucine. IMO, these two are just as important as leucine in the process. Leucine gets all the headlines, but the other two create the proper synergy..
And further exponentiate that with EAA's (the other 5 aminos that the body cannot produce on it's own).
My .02 -- I like the above mentioned products, probably PurpleWraath the best because it brings in EAA's, but I also like a product called NitroE8 when I'm in hardcore cal deficit; this is not cheap, but is beyond comparison..