I agree... the PB or SB 3K option is overkill for a simple little system like you are discussing. Even if you were to upgrade speakers eventually, you don't really need that much Sub in that situation. You'll have Headroom for Eons to be certain.\nI'm also one of those people that think the Sealed vs Ported argument is pointless. Though, in a small sealed room, 3-4 sealed subs can have an amazing impact. ;)\nI digress.\nYou should focus on matching multiple subs, not frankensteining different subs in a system. Audition the two subs and return what you don't like... if there is any chance you will put your new office sub in the main rig anytime in the future, than you should get matching Subs now.\n\nRegardless: it is your system and your Ducats! :D\n\nWhat you are missing is that there are two distinct different systems in different parts of the abode. The two are not next to each other!