Boss buttering
Anyone considering a complete B & O AV system has a budget that should buy about the best sound available. In Houston several months ago, browsed the B & O store in the Galleria. Flat panel LCD TVs, $12K, strikingly designed audio components and speakers: expensive. All beautiful to look at, but these components scream conspicuous consumption, as do Rolex watches and Lamborghinis. If that's what the Boss wants and he can afford it, hey, he's not into sound, he's into impressing his high rolling buddies and their much younger girl friends: Go for the B & O.
If he wants a great AV experience, your Marantz suggestion is probably pretty reasonable. Bose? Well, no. Look for unobtrusive speakers with good specs and listen to them. Lots of suggestions on this and other audio centered website forums. Lots of speakers available with great sound, especially at a B & O price point. Call the local high end audio store, give them some idea of a budget and get recommendations. Also, consider an installation consultant. The general consensus is that room arrangement can make a huge difference in the quality of sound, so spending a little of the budget on correct arrangement should be money well spent. If the boss is not an audiophile, the implementation of your original suggestion probably is no problem, but just think how impressed he'll be with your audio knowledge when the finished system kicks serious audiophile derierre.