you've done the right thing... too many people complain about the mkiii without actually trying it... really is a beauty, though a bit on the expensive side (however, per shot of shutter life, mkiii and 40d+grip are pretty much even, though mkiii has a few extra features and a much better battery)
Just remember though, just because it's a good camera doesn't mean it's the right one for you... Especially if you have an overbearing wife/gf.
I don't hate macs or OSX, I hate people and statements that portray them as better than anything else. Macs are A solution, not THE solution. Get a good desktop i7 with Windows 7 and come tell me that sucks for photo or video editing.