The HAI Omnibus system looks to be designed for European 220 volt systems with USA 110V 60Hz systems being an afterthought. All of their keypads use the square European style and they have nothing that works with Decora-style wall-plates. I think that this system is better suited for homes on the other side of the pond.
I also went through all of the Lutron BLAST training and was about to plunk down some $ for their starter system when I realized that there were so many other options available. Also, BLAST only gets you their partially enabled "Essentials" software rather than the full "Inclusive" version unless you take their Level 2 training class. In any case, it looks like the even the Inclusive version only has basic programmability as compared to some of the other controllers available for Z-Wave, UPB, and Insteon. (I know that its possible to control RadioRA2 from other HA systems, but I'd rather keep things simple.)
I did an inventory of my planned system and I will only have roughly 70 "nodes" give or take a few depending on the system that I will end up going with. So this may not stretch the limits of any of these systems after all.