How do you know what your weakest link is?

You can't tell what is your weakest link just by playing your system as you can't know what component is doing what.
You have to swap out successive components one a a time and observe the changes.  Experience listening to many other systems will also help.

You also need to decide if you want to be a tweaker.  You can add tweaks, again one at a time, retaining your present system and determine if you think any changes they make are positive or not.

@ j-wall 

Think I would focus on the phono stage. not sure what your budget is but would see if you can stretch and pick up a used Chinook. 

@johnss I've considered the Chinook, but I've seen many reports of noise, picking up fm signals and more selling them than keeping them. I'm hoping a Modwright will alleviate all of that and it will be a keeper. We'll see where I go from here I guess 

"I'm almost sitting on them. 46" from front wall and 25" from side walls. Bass is slightly boomy, but bass traps eventually."

Yeah, you have a lot of speaker in that small room. 

"I've considered the Chinook, but I've seen many reports of noise, picking up fm signals and more selling them than keeping them."
The times I demoed one in my system, very quiet.

This looks interesting-
https://www.analogplanet.com/content/hagerman-audios-tubey-quiet-trumpet-mc-phono-preamplifier

@tablejockey I'd be interested in doing a pool for gear. We should get some people together so we can all experiment and try gear. Let's start with the Hagerman.