Transport & tweaks for audio logic 24MXL

I just bought an audio logic 24 MXL with Marigo apparition digital rca and it sounds good with stock denon 3910.

Would i improve performance significantly with better transport? I want to stay below $ 1000 used unless there is huge gain. How is CEC TL51Z?

Are there tweaks with power cords or NOS tubes?

Thanks in advance