I made the jump from solid state to tube pres with ARC gear (SP6B then LS17) years ago driving ss amplification. I liked the tube "laid back presentation" with silky highs but the mids were slightly masked and I lived with the low end bloom. The channel separation and resulting imaging was not what I was used to having had dual mono ss pre's (ML and Krell). Tube rolling improved the sound overall and it was fun to listen to (albeit with "euphonic coloration").
Last year I went out and listened to an LS25 and some of the latest ARC gear... I heard a friend's dual mono Balanced Audio Technology tube pre (with full access remote control) and bought it on the spot (VK-31SE can be found used for under $2K now). The pre offers balanced XLR and unbalanced RCA ins/outs. For me, it offers the most realistic sound I've heard yet with the best attributes of tubes/solid state combined to reproduce music for under $2K. The build quality is outstanding. The downside; this unit uses (4) 6H30 "super tubes" - sources are extremely limited so no tube rolling (and they're expensive). I'm told to expect five year tube life so the life cost is manageable.
Last year I went out and listened to an LS25 and some of the latest ARC gear... I heard a friend's dual mono Balanced Audio Technology tube pre (with full access remote control) and bought it on the spot (VK-31SE can be found used for under $2K now). The pre offers balanced XLR and unbalanced RCA ins/outs. For me, it offers the most realistic sound I've heard yet with the best attributes of tubes/solid state combined to reproduce music for under $2K. The build quality is outstanding. The downside; this unit uses (4) 6H30 "super tubes" - sources are extremely limited so no tube rolling (and they're expensive). I'm told to expect five year tube life so the life cost is manageable.