Audio research LS25 any opinions

I use the LS25 mkI with a VT100 mkII. The como makes great music. Some people have been critical of the MKI. However, I have been very happy with its performance: Transparent, neutral, open, dynamic, smooth, musical, great soundstage. How does the LS25 MKI compare with the LS25 MKII?

I am also not in a hurry to upgrade both my LS25 and VT100 mkII. Remember, the changes may make the sound "better" technically, but less musical. To me, the bottom line is the enjoyment of the music. We will see.......

Has anyone tried the Powersnakes Viper v2 on the LS25?

Gjc: What brand NOS tubes were you using with your LS25? What were the improvements over the ARC 6922's? Thanks

Based on the recommendation from GJcooke, I purchased recently the 6H23 tubes from Upscale Audio. The results have been nothing less than spectacular. All musical parameters have been enhanced by this tube upgrade. The LS25 sounds like a brand new design with these tubes. I suggest that LS25 owners should try a tube upgrade before deciding to upgrade to the MKII version. In fact, I just ordered another set of 6H23 from Upscale, and have absolutely no intentions of ever "upgrading" to the MKII. Please note that the 6H23s are in fact labeled "Sovtek 6922" and appear to be identical to the ARC stock Sovtek 6922s. But beleive me, they sound substantially different: more robust,focused and powerful bass; better refinement; sweeter highs and midrange; larger soundstage with better layering and image focus. And to top it all, enhanced coherence and musicality. PHEW!!!!!!!