Best power conditioning under 400 bucks

I'm looking for surge protection and to clean up the power coming from my wall (currently I'm running directly into the wall with the amp and off a cheapy power strip for everything else). Currently I can't spend much more than $300 so was looking for recommendations new or used, and I'd like to be able to plug my amp into it was well without restricting its performance (McCormack DNA 0.5 Rev. A). I was contemplating the BPT CPC if there are any thoughts on that unit, but I'd welcome all thoughts/ideas.

By the way, I'm not looking to add warmth or anything like that -- just hoping to clear things up a bit and achieve a quieter background along with some surge protection. Thanks for any thoughts.