VTL ST 150, Audio Research VT 100, mk. II

Don,

Having owned both amps, I can tell you there are differences.
The VT 100 MK II is a solid all around performer. Nice extension, good 'staging, quiet noise floor and good dynamics. It is also a pain to bias, "needs"* expensive ARC matched output tubes and has a fan that some find objectionable to listen to. I never heard the fan during music play but it does make some sound.
The VTL is to my ears a more coherent sound. Less dry on the top and and has a touch more space and "air" in the 'stage. Bias setting is a snap and does not require matched tubes. VTL does recommend their own tubes but they are a lot less spendy than the ARC tubes. That being said, the VTL does not have XLR inputs and that is why I am selling mine. It is the latest version for sale on the 'gon used section.
The Mod 3A is a killer pre with plenty of voltage to drive either amp. The Vanersteen 2Ce Sigs are a huge value and hard to top for under $5,000.00. Either amp will drive them well. IMHO the VTL is a clearer picture into the music and recording. YMMV.

* I have heard and read a ton of discussion on the ARC tube replacement stance so please do not start a flame war (meant for the ARC die-hards, not the OP). I am just passing along what ARC has told me personally.

I think the VTL ST150 is still in production, so you could buy a new one. I think I would do that instead of taking a chance on something used and out of production. Does anyone know MSRP. I am considering going with something from VTL. I like audio res, but there are no dealers near me and i dont really like anything they make right now. I had the VT100 and loved it. I almost went for the new VS115 but thye price hike put it beyond what i want to spend right now.

I have an old style ST-150. I am driving a pair of GMA Continuum C3 HDs. This is a great combo and the amp has plenty of grunt and finesse all at once. So far it has been extremely reliable and the output tubes hold their bias. I would recommend it to anyone.

Shakey