Help with first cable upgrade.

Jnorris.  Thanks very much for your post.  I think I will seek an equalizer of sorts as I agree my system is somewhat low end and maybe my expectations should be tempered like the treble.  If I find a cheap upgrade for a power cord, speaker cable and interconnects I may pull the trigger with fingers crossed.
I spoke to tech folks at The Cable Co., Audioquest and Silnote and I must say, there is a lot of disagreement regarding sound as it relates to oxidation, stranded wire, solid wire, coated wire etc.  I think deep pockets make these experiments much more enjoyable whereas for me, it's an investment in music that requires a return, otherwise, I'm just throwing money away that I could use for food lol.

Thanks to everyone for taking the time to post recommendations.  I will certainly look at those cables if I pick up some replacements.

Cheers!

@shimanole

I don't know how "old" your "old" Sony CDP is, but the one I had way- back-when was terribly bright.

Can you borrow a different CDP and see what effect that might have?

Yes Stuart.  I actually have an old Toshiba XR-30 (something like that) and a sony DVD/CD etc. with built in DAC that I can try also.  I'm just going to have to remove an entire closet worth of the wife's crap to get to it.  Might break out my first receiver while I'm in there The Fisher 800.  : )

Mogami W3104 for speaker cable. 

Mogami Studio Gold for IC and coax . Also for XLR cables.
Have been using on different systems over the past 20 years.
Very satisfied.

Mogami W3082 is better than W3104, more transparent, the 3104 is colored...