I would like your opinion based on personal experience's or product knowledge on what set of Logitech 5.1 speakers I should go with? and what are the major differences between the two models? I have been waiting for one of these two sets to go on sale for about a month and originally had my mind set on the Logitech X-540 5.1 Speakers. Yes I know they are kinda old, but I have always heard they are a great price/performance ratio (plus I think the 540's look better then the Z506's). Now the Logitech Z506 5.1 Speakers are on a sale and if these speakers perform better, then I will go with these. At the moment Buy.com has the Z506's Tigerdirect deal , but with free shipping. C'mon speaker guru's...what should I do Right now I have Creative Inspire P7800 90 Watts 7.1 Speakers and my cat chewed up the wires when she was young and now they short out all the time.