Axiom Home Page Forums General Discussion Home Theater more speakers ??

haven't even gotten my first speakers and already thinking of getting more !!
heres my question today , i have the yamaha rxz1 receiver i ordered the epic 80, i was thinking of getting QS4's for L&R side effects for the dsp, is it worth it ? will i notice a big difference in sound ? also is having 2 subs worth the investment? and should they be matched subs, same brand and same size? or is this all overkill?

thanks for helping me thru these trying times. (day 4 )since i placed my order .

thanks

reyzor58