interconnect suggests under 300 used.

I would suggest replacing one cable first. That is the balanced cable from your primary source into the preamp. This where you should put your present $$$. Then, when your exchequer recovers, I would upgrade the other cables. If you do it this way it is a lot more fun. Cables from CD to Pre that I would suggest are Cardas Balanced Neutral/Golden Reference (try genesis168), Transparent Balanced Super or up, whatever Sergeui at Stealth suggests, Innersound Balanced (!), FMS, AlphaCore Sapphire or TQ1 if you can find one, and Acoustic Zen. When you want speaker cable in the future, check out Magnan as well as the other brands I mentioned. Have fun, but have more fun with incremental purchases!

I like Bwhite's suggestions. Let's run with that suggestion. You might want to borrow a super cable (eg Vahalla, Transparent Reference) between the premap and amp, and then find other cables that work well upstream of it that you can afford presently. Then you have a goal to work towards. NB: A dealer friend just lent me a Transparent Balanced and after 7 days of burn-in I can see what people are talking about....

Dear Electrostaticman-
Congrats on eliciting a great thread.
You have a reference quality tuner but unless the station, the antenna, and the broadcast material is of like quality I believe you should wait until the ml390s is broken-in before making any $$$ decisions. For example, I found a certain silver cable so-so on my Accuphase tuner until I made changes between the amp and preamp. Now that cable is super - I don't name it because it is not balanced and I assume you can run a balanced cable from your 102 to you preamp. YMMV. Again, the point is to have more fun doing it in stages. Relax, enjoy!