I am enjoying my analog system, but what can I do to improve?

@ruauliruegas, you say the transformer coupled preamp must go. I assume this applies to all transformer coupled preamp? or just my combination. Are you recommending OTL preamps?

@rauliruegas , the key with the Technics is "for the price." For the price it is a great turntable. My problem with the arm is that it is heavier and has more inertia than it has to have. This is why most if not all of the finest arms today are straight and not "S" shaped. It is not a neutral balance arm and it's vertical bearing is high above the record surface increasing warp wow. It has unnecessary contacts and removable head shells always add mass. For the money it is fine but chungjh's speakers are not "for the money" loudspeakers.

You are absolutely right that room treatment is mandatory for Sound Labs speaker but in a much different way than point source dynamic speakers. The wall directly behind these speakers needs to be deadened to prevent the back wave from overwhelming the front wave. Otherwise, because these speakers are dipole line arrays they are extremely directional and in most cases no other room treatment is required. 

Sound Labs and other full range ESLs are very amp sensitive or rather amps are very Sound Labs sensitive. Because of the ESL's wild impedance curve and reactive character many amps just do not do well on these speakers and many will actually burn out trying to drive them. They either require an amp that does not care about speaker impedance like the Atma-Sphere MA2 or an amp that can drive a 0.5 ohm reactive load at high levels without burning out like the JC 1+. High powered SS class A amps will usually do OK. Other tube amps need not apply at all. Amplifiers really make a huge difference with these speakers. I would consider in this case the speaker, amps and room be looked at as one unit, the most important one in any system but in this case they are inseparable. 

All the other issues you talk about are important and should be addressed but IMHO are secondary. I would also suggest to chungjh to have a good idea where you want to head with this and not to waste money on minor diversions. Do not waste money modifying equipment you do not plan to keep in the end. Save and buy the equipment you want permanently and can afford. Then you can deal with minor issues and other problems that might arise (like my turntable's feedback problems). 

Dear @chungjh  :  Applies to all transformer coupled preamps as the L7000.

Btw, you don't need to make any change with the Pass X350 that's very good design and handled perfectly your 545 speakers, don't worry about amp you are totally safe there.

R.

Dear @mijostyn  : " problem with the arm is that it is heavier.. " well that's your problem because the arm is at the lower range of medium mass and about the removable headshell that could be an advantage to mate it with any cartridge but there is no perfect tonearm, all in audio is about trade offs.

R.

My man your system is good.Do yourself a favor ,Enjoy what you already own....Don't go nuts and dont search for something over the rainbow....your there already.Save your money .If anything just get more vinyl you want to hear....Peace .