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
Hard to tell. Do you use any power conditioner?
I would probably get motor controller for the turntable first, then think about trying some passive or active power conditioner, then better cartridge and phono stage, then cables and power cords.
Thank you willemj interesting observations re: expectations. There could be something to that but I have to say when the vinyl playback is good - for ex. Hugh Masekela Hope 45 RPM - I think THIS is what music is supposed to sound like! I prefer the sound to CD even though the Marantz is, as you mention, well regarded. Which makes it all the more disappointing when quality pressings of  Pet Sounds or Sgt Peppers vinyl sound distant and muddled; hence my confusion. I'm wondering if one or more of my components is limited moreso than the medium. I'll def look into the Harbeths thanks for that. My listening room is set up the best it can be and I don't have an option of switching to a different room (kids!).  

   
 
Thank you inna. I do use a Furman power conditioner. Your suggestions make sense though I'm wondering if it would make sense to just purchase a better turntable before putting money into a new cartridge and / or phono stage?
It certainly might. I just didn't want to say that your entire analog rig could use a big improvement. In my mind, upgrading turntable is a serious step, almost as serious as upgrading speakers. Ususally, most people keep their good turntables for a long time so it would make sense to do a big upgrade, not just one or two steps.
the obvious upgrade would be to add a quality dac for your digital sources. i like your amp/pre and speakers.