First thing I'm going to say is I'm very excited yet very depressed at the same time...we are moving into a brand-spankin-new house in 7 months (yay!) but because of the wife factor, the surrounds have to be in-ceiling ...she would go for in-walls but there is nowhere to put them (two large windows behind seating area - which sucks the big one as well)...see doesn't even want my beautiful Hsu sub sitting out

So I know I should try to get ones where I can angle the tweeter a bit but my question is:

How far apart should the side speakers and also the rear speakers be? I would think the sides should be the same distance apart as the fronts and the rears should be closer together...is this logical? If my sides are 8 feet apart what should the rears be? And should I even bother with 7.1 considering I have to use in-ceiling?