If you were to order Axiom speakers , without a sub, would there be a noticable difference in bass performance between the 60's or 80's. The reason I ask is we have 2 year old twins and once we get them to bed the last thing I need is for the cribs to start rocking when the EP 350 or 500 kicks in. The bedrooms are on the second story and the system will be in our basement with quite a bit of insulation in the ceiling and walls, but it certainly won't be an isolated room, and from what I've read on the boards the Axiom subwoofers make their presence felt. Will I be terribly dissapointed without the sub right now?