I'm trying to plan out my speaker purchase, but this question perplexes me. It seems to me that the principal difference between floorstanders and quality bookshelves is lower bass at higher volumes. But what if I will be buying a sick subwoofer (SVS) and don't particularly need the bass below what the bookshelves produce? Is there more to bass than just covering all the frequency ranges equally? Specifically, I was looking at getting a 5.1 setup, with PSB Stratus Mini's (50Hz - 20KHz ±1.5dB on-axis) or PSB Stratus Silveri's (40Hz - 20KHz ±1.5dB on-axis), paired with an SVS 16-46 PCi. My home theater room is not TOO large, but it opens up to a kitchen, dining room, and rec room respectively on three different sides, making it sound like a fairly big and complex room. (There are no doors between the rooms...only openings in the wall which are about 8' wide). So, with those options and those room conditions, would I be wasting money if I went with a pair of Silveri's over a second pair of Mini's?