i have not owned any vtl products. i have listend to them on demos. i love the 25tt's (just not enough jucie). if found the vt85 (think that was the number) ok; probably would be alot better with nos tubes. i will say that i own rogue monos (better price point; much improved sound with tube swap). i have retubed them with nos tubes from vintage tube services. i found it intresting that vintage will warranty all his nos and used tubes on all gear except "vtl". fwiw.
jim
jim