Hi folks. Having been reading avidly about the actual difference that a decent sub could make to a system i have started feeling a warm sensation in my pocket (where i keep my cash ) I currently have a Mission 70ASE sub which is bundled with the Cinema 6 Pack system and was thinking that maybe a VX 10 would go quite nicely but I have a couple of questions: 1. My Mission has a frequency response of 36-180Hz. Would i notice a great deal of difference with a VX 10 whose response is 36-120Hz? 2. What kind of price would I be able to get for my Mission sub? 3. Are there any other subs in a similar price range that compare well and would be worth looking at? Size is an issue as well as I don't have a great deal of room available I'm just feeling things out at the moment so any help would be appreciated.