I have an audio addiction...first time that I bought Axiom so I am excited to see what's up

just ordered an EP350...have a 13' x 23' room with 7'6" ceiling height in basement with carpet

Currently have a couple of 10" Rocket subs-- really musical but they are DOA, so not happy at all...they will be fixed and moved elsewhere.

Have lots of gear but limited sub experience.

run Totem/ Emotiva HT in bedroom and Arcam/Totem HT in living room - 1 with Totem 8" sub/ other no sub yet

Basement HT room I have Outlaw 990/ Emotiva amps, Onix Strata Mini fronts (these have integrated 8' mid-subs) and Onix Ref 1.5 rears..nice system - we have young family so subs can't go that loud....will I be happy with dual EP350 long term (Say 5+ years) or is it worth working towards dual EP500? Will I hear the difference - can't listen loud for awhile yet \:\) - babies waking up is not a good thing...I realize that subs going to 16Mhz are good but will the average listener appreciate this?

Any thoughts are appreciated...