A guy came out to the house and layed out everything I would need.
It would seem Best-Buy must have thought Christmas had come early.
My first question is why are you forced to use best-buy, You will do a lot better using a dedicated Hi-Fi, HT outlet, rather then a box seller, who's sales people really have no idea, of what's available and what will go with what. Or does "her indoors" dictate your every move. Now I know why I traded my X in when her time was up. Woman are a bit like guns, You can always trade a 45 for a 22. Please excuse my sinasisium.
May I inquire why your restricting yourself to in-wall speakers, which may I say require specific knowledge to get the positioning correctly alined. Hit and miss will simply not give you the best result. It's not like a floorstander, which can be moved to get the correct alignment.
Unfortunately you have not quoted a budget. So no one is able to say if your getting a good deal and value for your money, And once it's spent it's gone forever.
I think BMX have given you a good concise list of what you should be looking for, by way of installation and costs involved