Hi Bogdan,
I'm a simple user since last august; I'm on a i7 980X (@ 6x4 GHz, HT on), Motherboard X58; 24 GB RAM; the most samples streamed from two 256 SSD;
that's a certified DAW for MIR and I'm very glad until today for deciding to go with those machine. Very stable, no glitches and stutters using low latencies (128 or 256) for moderate projects (until using of 14 GB RAM) - CPU usage 15 - 40 %); and works very well even for a whole orchestra - naturally I have to choice than a latency buffer between (512 until 2048), depends of the arrangement. In this way never I didn't care for the Mir requirements...On this system it hasn't been noticeable for me. Hope the informations are helpful for you.
Best
Frank