I've got a set of the Eltax Hollywood (5.0 system, two floor standers with built in passive subs, center and two surround rears).
Bought the set for £150 from Richer Sounds and they sound fine.
Recently bought my Sony STR-VA555ES reciver and thought I would upgrade the speakers as well.
Well, I got the Sony set up and the sound is just excellent even from what is classed as "budget" or "low end" speakers. The built in subs work as good as having a seperate active sub with careful setting up on the amp.
Sure, I could go and spend a lot more on a "proper" home cinema speakers system, but to be honest, I'm in no rush to do so as it sounds great as it is.
Cheers
Ian