Another alternative would be use use "Virtual PC" on your Mac. You can set up a Windows volume and do all your PC stuff using it (on your Mac). If you have a lot of PC stuff, this may be more cost effective in the short run than buying all that software over again. Of course, you still would be dealing with Windows for the time being but as you buy upgrades /new stuff you could gradually shift over to all Mac.

Before they made me they broke the mold!
http://home.roadrunner.com/~kflach/