OK.
I tried again with my friend's upgraded systems: McIntosh 275 and PrimaLuna ProLogue three, and Bellari VP129 tube preamp, still with Grado Gold.
Mine is ClearAudio MicroBasic phono preamp, still with AT125LC.
We tried a few different LPs -- Bach Toccata & Fugue by Ormandy/Philadelphia, LA4 Nauvoue Bach, Jim Hall Aranjuez concerto, and few other violin/cello concertos. Actually mine sounded better on all but T&F -- mine lacked a little bit on base and the sound lacked a little bit of detail with full orchestration.
But mine produced more pleasing highs and we felt little bit more liveliness.
Well, we did not swap the preamp. Bellari may be no match to ClearAudio preamp. The conclusion was that I would not need an upgrade for a while.
BTW, my system is Yaqin (YaOin?) MC10L tube integrated amp (made in China) and Taylo 7U.