I now have 5 M&K LCR-55's and am ready to upgrade. I use my system mostly for HT. The left & right fronts are built into a HT cabinet. The opening size for these speakers is 20" wide, 12 3/4" high and 24 3/4" deep. Most quality bookshelf speakers are too tall to fit into this space. If I lay speakers on the side will I sacrifice sound quality? The room is 22' wide and 21'long and completely open on one side. I am using a Pioneer VSX 49 receiver. I would like to buy 5 new speakers and keep my cost at $3000 or less. Suggestions?