I also wouldn’t blow 10K on power cords and conditioners in this early stage of your system. If you have a desire to upgrade your speakers, I would do that first. Once you find speakers you like, I would then look for a good quality integrated amp to drive it. If you are looking used, you can get much more for your money, but choose the speakers first. I have found the Lintons to be a bit polite sounding with anemic bass.
once you have the speakers you want, (I would budget around 6K or so for speakers), you could then decide on a good integrated amp. A Parasound Integrated comes to mind at under $3500 or if you want a tube integrated, a Rogue Cronus Magnum integrated would set you back about the same money, $3500.00