I've not used logitech for their surround sound, but have used other products of theirs and found them to be reliable.
I spent £20 on a Technika system (it was half price at Tescos) , my advice, never buy anything from Technika, dirt cheap, but crap. Three of my speakers are broken, the line-in cable is faulty, so sometimes I get only one channel playing through. The sound is terrible too, it's what I get for being such a cheapskate.

Logitech did 2:1 for the same price, so I should have gone for them instead - it's not as if I can get 5:1 when 3 of my speakers are broken.
Click!
