I agree wholeheartedly with both Alborg and Adam. However, as well as Adam explained the editions, six (not seven as I said earlier) is four too many. Let's make all the home versions, Ultimate and all the business versions, Business. Nuff said. Simple.
The IT proposition is a difficult one. You may say I am flip-flopping (and no political reference there), but they are a double-edged sword. Every single friend of mine who had a network designed by a so-called expert got ripped off and left with a configuration that was not only done incorrectly but was left without the username passwords or instruction manual (not a real instruction manual). And, the IT person was't necessarily trying to rip them off; they are usually an acquaintance who, at the time, knew more than they did about networking and had all the buzz words.
When I refer to IT, I am talking about something like a Microsoft Small Business Specialist that will set up your network perfectly. Hopefully, they will show you what they are doing, but there is such a thing called job security so tney may not.