I found two, very good old speakers that I want to add in as side surrounds. The only problem is that, due to the nature of the room (a huge sliding door on one side, a window on the other), it is impossible to put them equidistant from the front speakers and the back surrounds. I've made a picture illustrating the options that I have:
So, what should I do? Should I place them closer to the front speakers or closer to the back speakers?
Also, the only discs I have with 6.1 or 7.1 surround sound are Disturbia, We Were Soldiers, and Top Gun (All on HD DVD, all have 6.1 DTS tracks). How would that work with 7.1?

So, what should I do? Should I place them closer to the front speakers or closer to the back speakers?
Also, the only discs I have with 6.1 or 7.1 surround sound are Disturbia, We Were Soldiers, and Top Gun (All on HD DVD, all have 6.1 DTS tracks). How would that work with 7.1?