My system is a very similar. My Mac integrated is an older version of yours, and I'm also running the same cables. The combo seems to work very well with the Ohms (I have MicroWalsh Talls).
The midrange purity with lack of crossover in that critical area is very addictive. At HE in New York last month, it took some very expensive systems to achieve what my little Ohms can do for a only a grand. It's a great design, I can listen for hours (to music, not my system). The big sweet spot and major bass response is another plus (among many others).
For my sized room/price range, nothing (monitor or floorstanding) can touch the MicroWalshes. You're spending a lot more, so your options change - maybe someone else here can recommend an alternative. I haven't heard the larger Ohms, but I would bet they'll give comparably priced models some very stiff competition.
If you haven't yet, check out these sixmoons.com reviews: