Does a good sounding surge protector exist?

My and my friends are searching for an elusive product, a surge protector that doesn't limit the dynamics of the music. Between us, we've tried quite a few, Chang, PS Audio (Quintet, UPC, PPP), Equitech, SurgeX, Richard Gray, APS Purepower etc. However, if its a good surge protector without MOVs, eg, SurgeX it severly limits the sound - dynamics and soundstage are compressed, highs cut off...

If it doesn't limit the dynamics significantly, its surge protection is questionable at best eg., Richard Gray, Chang, PSA Quintet. Is there something out there that will protect our gear without making it sound like mid-fi crap? I open the floor...