The BrickWall surge suppressor/line filter I mentioned earlier is used by a number of A'gon members, and I don't recall ever seeing any complaints about it choking off dynamics, if that is your main concern. It certainly doesn't seem to do that in my system. Although my amplifier is class A and therefore draws essentially constant current regardless of the dynamics of the music, so results with class AB or class D amplifiers could conceivably differ. It costs $259.
If you want a power strip that is purely a power strip, though, and does nothing to the AC beyond routing it to multiple outlets and providing a switch, why not try the $38 Hammond model I linked to earlier? It doesn't have the Furutech's fancy contact platings, cryogenic and demagnetized conductors, emi absorbent coating, etc., but who knows what if any benefit those features would provide in a specific system anyway.
Regards,
-- Al