Seeking Suggestions on Preamp Upgrade (CJ, Aesthetix, EAR)


I have about $5,000 budget to upgrade a preamp.  I am using Luxman 550 integrated as a preamp currently, it sounds a bit too lean to me.  Rest of the system are Pass XA30.5, Dynaudio Contour 3.4, Marantz reference SACD.  I am thinking CJ CT5/ET5, CJ ACT2, Aesthetix Calypiso, EAR 868, or Zesto Leto.  Thank you very much!

davidhe19audio
Stewart0722, thank you for the warning.  I did notice there were some complaints about noise pop up here and there.  Most of them I noticed were about 10 years ago when the Aesthetix came up.  I don't know if it is still the case today.  When did those incidendents you described happen?  I will be worried if it is recently.
Jperry:

Thank you for the comment.  I wonder if you can elaborate a bit on Aesthetix and Pass mismatch.  I would like to have some tube sound to my system.  Everything I have so far is solid state so far.  I have been trying different cables to warm it up, and have made progress.  I hope rely on tube preamp to substantially improve the warmness of the sound.
davidhe19audio-

Conrad Johnson & Pass Labs are a sonic match. The Act2 Series2 is very sweet. Additionally, I have heard the ET-3SE-very sweet as well.

I have always wanted to demo an ART(2/3) and ET-5. It is my short -list.
I have not auditioned any CJ pre-amp w/ Pass Labs, only read about their inherent synergy.

Keep me posted, mention your dealers/retailers all.
Happy Listening!
2nd note;

Pass Labs and Aesthetix are sonic matches too. Read much about this pairing. Not had an actual demo together. 
The issues I heard about were from a dealer who had purchased Aesthetix for his personal use....he wasn't an Aesthetix dealer.....It was about 2 years ago......overall, he has been much happier with the Zesto, he became a Zesto dealer after purchasing their preamp.......at 5K used, you should be top of the food chain in terms of a tube pre.....you can do a lot better than Aesthetix.......

There is a Leto on gon for around 3500 now

If you want to have some real fun, get the Precision Fidelity C7 on gon now....these are like hens teeth, hardly ever coming up for sale.....one of the most musical preamps ever made..I owned a gold one in the late 80s, biggest regret ever...selling it...this guy wants around 1300 or so.....There is also a few CJ options on gon right now.....