@rohlim in that price range the new AQ Niagara 1200 definitely fits the bill. On a used market a Puritan PSM156 which comes with a very decent and flexible power cable, or a used Shunyata Hydra Talos is another good option as well as Isotek.
I use Puritan and like it a lot. Audible improvement in reduction of noise floor. Previously owned Shunyata Hydra 4 and had the Richard Gray unit on trial. Preferred the Hydra.
One other item that is frequently overlooked is the outlet. I was extremely skeptical but curiosity got the better of me and I installed a Furutech GTX-D NCF outlet and it’s one of, if not the biggest sonic ROIs out there. Many choices when it comes to outlets. Point I’m trying to make is it makes a difference, add it to your list.