Mac is the way to go, you've got bootcamp so you can run Vegas & Architect, If you can get Final Cut studio you'll have Final Cut, Motion (similar to After Effects), Soundtrack Pro & DVD studio Pro (which will do all your menu commands as you've mentioned).
I used Vegas for years from v4 to v8 and I still prefer it to FC, but I don't have bootcamp & I do miss it.
But now I live a stress free life without PC's!!
J