Might not be helpful but correct.
Majik, how big is your room? The bigger the room the more woofage you require. If you can afford the 800 and can wait, then buy it, you can never have too much subwoofer. The bigger more powerfull sub will just not have to work as hard to pressurize the smaller rooms. The main differences between the subs, other than the obvious appearance and size differences, is that the higher up the number the lower the sub plays. The 500 is good for 18hz, the 600 down to ~15 and the 800 is stated as being good to ~12hz. The lower each one plays the more feel you get with it.
