Most of the serious bugs - can't-complete-mainline-quest-so-my-entire-game-is-now-wasted bugs - have nothing to do with Windows version.I would still wait. The first patch is out & seems to have addressed some of the smaller issues that were identified early, but none of the important ones: mainline quests, GPU temperature etc (doesn't matter what else your rig can handle, MMX will fry it - and it has nothing to do with the quality or otherwise of the graphics).
Gorge yourself on Heroes VI then saunter in after a couple of patches & enjoy what we should have got from the start.
