Just ordered the Jungson 88D Luxury Edition.

Koczka123 I think your problem is not going to be solved by cables.
If you read every single review of the Jungson 88d people say the same thing - It sounds like a tube amp, and has great mids -

If someone describes an amp as sounding like a tube amp, I immediately think of it as being slow and lacking in dynamics. It just depends on personel preference and it sounds like you prefer a solid state type amp.

Incidently all the comments I have seen about Korsun say it is fast and dynamic - the opposite of Jungson no doubt

Of course not all tube amps are slow in bass, but a lot are.
So when reviews of the Jungson just talk about the good midrange and tube sound and never mention bass or PRAT, I put two and two together and presume thats where its strenghts lie.

Some people have said that the Korsun is fast and dynamic but too sterile sounding - those people should try the Jungson!!