A good move in general i think (money permitting). 3dsmax is now about the only 3d program thats not yet on mac. But other than that im struggling for reasons to use windows. For nurbs macs got alias running pretty sweet and soon will have Rhino5 in full, for sculpting mud box and zbrush work sweet, modo and cinema 4d for sub-D, maxwell and the mighty Keyshot for rendering, and Maya for... well, everything and anything if you can drive it. Youd be amazed how well my old laptop (duocore intel, 2gig ram) runs everything (struggles with polysculpting over 1.000.000 or so in mudbox).