What's the weak link in my system?


     I've pieced together the best budget system I could afford over the years but I'm just not thrilled with the sound I'm getting. Can anyone help me identify the weakest link (s) in my system so I can upgrade? I only have the budget to upgrade one piece at this time. I'm most interested in listening to vinyl.
Currently Configured:

Pro-ject Genie 1.3 Turntable w/ Sumiko Pearl Cartridge
Bellari VP 130 Phono Pre w/ Tung-Sol Tube & Replaced Power Supply  
Marantz CD 6006 CD Player
Parasound P3 Stereo Preamp
Parasound A23 Power Amp
PSB T6 Platinum Speakers
Bluesound Node
AKG K702 Headphones
Audioquest Daimondback Interconnects
Audioquest Rocket 33 Speaker Wire

Also Have:
NAD C235BEE Integrated AMP
Monitor Silver RS6 Speakers
Marantz SA8260 SACD Player (Used to sound great but doesn't work consistently - not sure if worth having repaired)
Musical Fidelity V Can Headphone Amp


So.... I think I have put together the best possible system configuration using what I have. What would be the weakest link / first to upgrade? Turntable? Phono Pre? Pre-Amp? Suggestions of products to upgrade to without breaking the bank? I've accumulated a bunch of stuff but I'm really a novice so any and all feedback would be greatly appreciated!   

jdm11
It is good that you listen to a lot of live music and especially that you enjoy your system. My point is only that you have little to no evident experience with any of the recent digital gear, nor cabling, so it is not helpful to post your opinions on those things. Looks like you could contribute quite a lot of good advice on the music threads...

As for turntables, I doubt that you will be effective at changing anyone's mind on that one way or the other, so why not give it a rest. 

The big flat piece of glass is the plasma TV you listed as part of your system.

Dave
OP, a good example of a turntable to consider would be Rega or VPI

but if the room is taken care of as per the post above, I’d rip the CDs onto a mac mini or purpose designed storage system and get a good DAC, while paying attention to galvanic isolation - Schiit makes one called Eitr and it can be returned if there is no improvement

you have the best or one of the best $500 CD players from a few years ago, but that does not mean it is the best possible way to get digital sound from a CD to your pre-amp

also be sure you have the best recording/mastering of any music you care about

you have a very good system already so improvements in SQ will not be inexpensive
If somebody likes vinyl I wouldn’t suggest getting rid of it. I have some very good sounding vinyl that beats an equivalent digital source. 

In my reply above, I didn’t mention anything about cables because this is a controversial topic and the poster has a few purchases to make before looking at cables. at audio shows, I have attended seminars/demonstrations comparing cables worth $200 all the way to $8000 all from the same vendor and I heard differences between each cable. My thoughts were always, is it worth the upgrade for the price? I go for great cables that cost usually less than $1000 each. 

If if I was setting up a system I would wait to buy everything that you need in your room and bring in 5 or 6 different cable brands in your price range and do a cable shootout. It’s actually fun and then you can rest after your purchase knowing you bought the best cable that sounds best in your price range 
I have a budget system, too (WAY more budget than yours!). So maybe my experience will be useful.

I went with the advice I was getting, that the turntable and arm are the most important item in a vinyl playback system. Which meant replacing an old Technics with an old Thorens TD-160 (I told you it was a budget system).

Then I kept following the advice, which was to get as good a cartridge as you could afford. I was enjoying an old Grado with upgraded MZ8 stylus ($200 here in Canada!), which has a very attractive warmth and depth (as others have noted), but when a Linn ASAK came up for sale for $50, I bit.

Then I needed an MC preamp, so I bought a Pro-ject Phonobox S, but it was WAY too noisy. I found a Rotel receiver with an MC stage, for dirt cheap, so I am using this until I can afford a big ticket item like an AR tube phono stage (my Tannoys are bi-amped, with an old Electrohome SET amp powering the aluminum horn-loaded tweeters, and an old Nikko Alpha II powering the woofers. It sounds very nice.

So, long story short:

Best Turntable/arm you can afford
Best Cartridge/Preamp you can afford
Then the regular order - speakers, amps, accessories/room treatments

Hope that helps.