Tenor Hybrid v. VTL MB-450 Sig.

I am planning on replacing my VTLs with the Tenor stereo 150 hybrid . Since I will not be able to hear them first and since they are a substantial outlay over what my VTLs are worth, I am hoping that some of you may have heard both. Would you mind characterizing the differences that I should expect to hear? I have Merlin VSMMs, a First Sound preamp, and an Audio Logic 24mxl DAC. Other amps that I am considering are the Joule VZN-100s, or a CAT JL2. My pre-purchase buyers remorse is that they will be better but maybe not commensurate with the extra cost. I am aware of the higher cost/diminshing returns reality. However, from what I have read, these hybrids seem to be a huge step up. If I audition a piece and hear an improvement that meets my personal cost/benefit ratio, I buy it. So, with no personal experience with the Tenors, I am finding it is a bit difficult to make the leap to buy the most exp. piece of gear in my system. Any input you may have is greatly appreciated. By the way, JTinn and I have had several conversations about this subject. He had been very helpful and generous with his time. In this post, I am looking for more of a comsumer point of view.