I am wondering if there is a need for a line conditioner? Is there a noticable difference? Also what model/brand is good for the money? here is my list of stuff
Yamaha 5790 reciever
Samsung hd-841dvd
KLF-20's front bi-wired
KV-2 center
SB-15 front presence
SF-3's rear surround
RS-35's 6.1+7.1
RW-12 Sub front
KG-SW sub rear
Hitachi 50v500 hdtv
I currently have a basic surge protector. I have spoken to a local hi-end audio store and they said that I should have at least some sort of line conditioner. They sell Monster there but I can get what they sell a hell of alot cheaper on ebay.

Any advice would be great.
Thanks in advance Denver