The reason I went into Windows is because we have a mix of platforms inc Linux working here and as often happens one of the MS boxes 'crashed' and the always reliable Mac available that has Windows crap on it had to be used.
So basically you're admitting you can't get along without Windows. Fair enough.
The macs are just there for troubleshooting if theres problems. Like not updating your security?
I'd advise getting a decent IT guy in who can look after the systems for you, that way you don't need to buy a mac for troubleshooting. Alternatively get a LiveCD of linux, much cheaper and easier!