I use the Furutech GTX-D NCF(R) Ultimate Nano-Crystal Rhodium-Plated AC Duplex Receptacle. However, any thing is better and will do better than typical cheap outlets. In other words any good one.
Why? The whole power “chain” is also equipment. Practically all replace power cords. So…..
My house and street has poor dirty power and after attacking that the system got noticeably quieter/blacker/defined.
Running dedicated lines if possible is great but for many of us it starts at the wall. Getting a whole house surge protector is the first thing I’d advise anyone to get.