I would say yes, but its very conditional. First off, the main reason I would dual boot anyway would be for games... If WINE ran at 75+% speed for games and applications (I use autocad currently, for which there is no OS X version) then I would gladly use that. However, my gaming days are limited and for those times that I do game, its almost always on a console, so that part of the equation is rapidly dwindling. Also, if I leave this job and no longer do CAD, then that part of the equation would be gone and all that would be left in windows is ... well, solitaire 🙂 .
But if i did dual-boot, it would be OS X and a compact installation of Win2k with a lot of stuff turned off.