I have very little experience with Home Theatre gear, but, I have heard Martin Logan speakers benefit from aftermarket cords; the bass firmed up and had a solidity that was lacking with the stock cords. It's worth doing (given the right cord.)

I don't think I recall a regeneration device being used for speakers, but, I suppose cleaner juice there couldn't hurt. You might just contact PS Audio and ask about the best implementation of their products: sales@psaudio.com

My suspicion is that regeneration would be recommended for the sources and amps, and Ultimate Outlets or UPCs for the speakers.

I use a Power Director and Statement cords in my main rig, and an UO with my headphone setups. I can't recommend the PS Audio gear highly enough.

Keep us posted and welcome to the madness.

My suggestion would be to first have several dedicated/isolated, 20-amp lines (along with Hubbell "hospital-grade" outlets) installed in your listening space. Secondly, I would recommend Shunyata Research's (non-regenerative) Hydra power conditioners; as well as their Powersnake power cords, such as the Diamondback and Copperhead models.