I was an owner of a sony all in one 5.1 set for years, and recently was blessed enough to be able to purchase a nice stand alone 7.1 HD receiver and be able to replace my speakers.
I ended up settling on the CS1 for center, Monitor 50s for the fronts, and monitor 40s for the real. My existing surround speakers will stay for limited 7.1 use (since it isn't used very much on blu ray)
Here are some pictures of my setup. This first one shows the layout of my room and furniture, and the placement of my existing surrounds (I never knew that in 5.1 surrounds weren't supposed to go behind):
The next two are my best guesses at where I should put the Polk 40s. I am limited because the walkway on the left side of the furniture L shape is narrow, and so they must be a little behind, but I am unsure of whether they should be angled towards the listening are like in this:
or flat against the wall like this:
I am just worried in the flat approach that if there is a rear port hole on the 40s (still waiting on them to come in) that it will be covered, and that the sound field will not be that great since they would not be facing the central listening area.
any suggestions and tips would be GREATLY appreciated! Also any tips on how to mount the 40s, I am worried they are too heavy for dry wall mounting and have never mounted in cement (right wall).