Depending on his willingness to "invest" in learning how to operate this stuff, you might want to consider something simple to operate. Sound may wind up be secondary here. Remember, a fancy remote could take up a goodly portion of the stated budget.
Not to sound crass, but this is where Bose finds it's target market: Those that want invisibility, simplicity, and lastly, sound.
Is there any way he could be talked into a two channel system, perhaps with a sub later? Much better bang for the buck.