I have a pair of Furmann SS-6B surge protectors that cost me about $60. I don't want or need conditioning, but I do want to protect my equipment from surges, spikes, and voltage dropouts. The SS-6B offers a slight degree of RFI and EMI filtering but, according to Furmann, not enough to be considered a "conditioner". This is fine for me since I only am looking for protection and dont want to add components that alter the sound. They do make a fine line of conditioners that are much more expensive if that's what you want.
J.Chip