Roberto,

I had a Belkin PF60. It did a great job for the cost. If you need 6 outlets or less, consider a Blue Circle Peed Al Sea Thingee - review here:

http://www.goodsound.com/equipment/blue_circle_peed_al_sea.htm

Monster/Belkin/Furman approach AC filter with a combination of chokes, transformers, ferrite cores and capacitors. The Blue Circle approach relies purely on capacitor filtering and does not limit current on any of its outlets. The outlets are Hubbell and very high quality.

I have mine sitting behind my gear. It is probably the best buy I made for my system.

SC-05, HLT6189, Oppo BDP-93, Blue Circle Audio FX2
Axiom M2v3's, QS8v3's