I always follow your posts because of the sheer number of speakers/subs that you have. For now I can't keep both the 500 and 600. Once I hear the 600 I will have a better idea of how I'd like to fill out the room with subs. For what it's worth I did have an sb16 ultra in my HT before I bought the 500. It was decent but something about the sound wasn't as clean as I like it. My guess is the woofer size. It seems very similar to my car subs, I prefer 10" subs in my car because they are tighter sounding and I've had everything from 8" to 18" subs but the 10" subs always seem to be the sweet spot. I already preferred the 500 over the sb16 even thought the svs was louder.
