ARC Ref3 or McIntosh C2300/2500

I agree with the recommendation for the Ref 3. All I would add, is that the LS27 is a definite step up on the Ref 3, having auditioned both together and both can be found second hand.

Another thought if you are looking for a "tube" midrange, is Conrad Johnson. I used a CJ 17LS for years and just loved it. You only get Phono, not XLR outputs of course.

I agree on all counts with Kurt_tank. If you want a sound more like the VTL in the midrange, I'd suggest VAC or, if you want an ARC product, a well-maintained LS5, if you can find one.

Vdosc, Both of these companies make great gear. To add another point of view here, I have the C2500 that I use with a Levinson 331 amp, Transparent cables throughout and Wilson Sophia 3s. Music is streamed from the NAD Bluos system. The Hybrid system works beautifully for me. The Mac has added musicality to the Levinsons precision. Imaging is crisp and listening is non fatiguing. I respect both the Mac and ARC Brands and had a similar choice not long ago. I chose the Mac because it is multifunctional and its' connectivity really future proofs my pre-amp for a long time. If you use the internal DAC, it's actually quite excellent. Believe me, no rap on ARC. If I went that route, I'm sure I'd be singing its praises. There's no wrong choice here. Find a dealer that carries them both and take a listen. How bad can a Mac tube pre-amp with an awesome Mac ss amp be? Best of luck and have fun in your quest.

A number of years ago, I switched from Mac C1000 3 piece (tube,ss, ps) pre to Ref 5 and felt the Ref 5 crushed it. This caused me to unload my Mac amp for an ARC amp which was of equal or greater importance to the overall gains in my SQ. The only area where Mac combo was better than the ARC combo was on impact in the very low end. But, the bass on the Mac was also somewhat diffuse and not nearly as tight and well defined as the ARC. All in all---no contest. Not the exact comparison you seek but I think instructive of the house sound of each. Ref 3 will be more refined than LS26 and tube magic will be there in the midrange, but more transparent than Mac.
Hate to tell you cause I know your amp well, but I highly recommend going all ARC or all Mac. For a time, I had ARC Ref 5 and Mac amp which I thought was the worst of both worlds. An all Mac system gives you smooth, rounded, burnished and pleasing but not very transparent sound. Never bad, never great. An all ARC system brings huge soundstage, great color texture and bloom. Rarely bad (recording has to be awful) but often sublime.
I'm not surprised by your VTL / Mac experience as VTL is closer to Mac sound so this would not produce the worst of both worlds. Any chance you can try an ARC amp in your system to see what I mean?
By the way, all of my experimenting with ARC and Mac (also VTL, BAT and Lamm) came when I had Watt Puppy 7s.

Vdosc-

having heard all pre-amps plus the ARC Ref5 SE models in your query, I can very strongly suggest (w/o hesitation) the ARC Ref 5SE. This is the one you want! Save your time and money on the rest. Oddly enough I felt the Ref5 SE sounded best when mated w/ a Bryston power amp on Wilson loudspeakers. Keep me posted & Happy Listening!