Thanks for your input. Eventually after listening to both, I actually went with the Mac. I don't mind to sacrifice the low end from Krell for the overall much relaxed presentation from the MC402. Ya the Olympica 2 has different taste from their older model, but overall I like the changes, to me they are more transparent / neutral..
I guess it is same for the MC402. Compared to older Mac, it is kind of different taste, but overall in good way. No doubt the 'magic' from older Mac & SF is still very tempting, but i think both new designs make it a better all rounder for more type of music genre..
Now im one happy owner of MC402, yay!