I am a complete rookie and could use some clarification on the supposed specs detailed by Onkyo and Emotiva. My Onkyo TX-NR818 apparently is capable of 135 W (8 ohms, 20 Hz-20 kHz, 0.08%, 2 channels driven, FTC). More stats at http://www.onkyo.ca/Products/model.php?m=TX-NR818&class=Receiver...

I am looking to spend somewhere around the $500 dollar mark to upgrade my system. Being a rookie I really need some advice as to which components really should recieve the attention. I have been looking most at an amplifier but was also looking at my subs. My current system is: - Onkyo...