How good does my system have to be to realize an improvement with cables?

@tablejockey +1 (very wise and sage advice there.)

if it sounds good, then the “fear of Missing Out” (FOMO) is mostly coming from reading the forum.
So if it sounds good, then just enjoy it.

Or put a different way How would you know if your cables are your weakest link?

Start with the cheapest Best Buy cables and if the expensive ones make no difference, then job done.

It is pretty easy to spend more than 10% even doing DIY cables, on gear that is not super expensive. I must have spent over $1000 on cables an ICs between the wire and the ends in the last couple of years… and that was for DIY cables. Easy to do ~$40-50 on a DIY IC, and more if one is using silver wire instead of Mogami or Cardas etc. wire.

Usually I have found that moving the speakers a few inches makes more of a difference than I have noticed with cables.

I’d likely buy BlueJeans if I did not have a soldering iron.

Wouldn't that $200 be better spent on a better component? 

Bingo!
We have a winner.

I am totally “out experienced” here.
I probably only have 40 hours all in, with determining what to get, ordering it, physically making the cables, and the time I needed to work to get the funds… but I figured if the studios that are recording and mixing are using Mogami and Cardas by the kilometer(s), then if I use the same I should not loosing a  lot… Any loss would already be gone before I got the album.

However most of those studios are probably on XLR now, so maybe consider selling you gear and getting the XLR based gear, which is less fussy with cables.

Quality cables win every time. 

OK - and what are the physical attributes define quality?