Well, like I said, he is local for you. Not sure if they have a showroom or not, but perhaps there is a possibility for you to investigate directly in the Bay Area.
And just because you may not have gotten "the organic, 3D, weighty, huge soundstage sort of sound" without a SUT, does not mean that it isn't possible to do so.
Mostly, I want to point out a few things:
1) that some listeners prefer SUTs with LOMC carts, others do not.
2) that there seem to be situations in which SUTs and LOMCs may not be ideal matches (the example of the high impedance LOMC carts in the TAS shootout, as suggested by the comments by our buddy Garth).
3) that certain carts and certain SUTs may be better matches than others (for example, this reviewer prefered a $650 SUT matched specifically for his mono Miyajima cart to a much more expensive $5000 Auditorium23 SUT:
http://dagogo.com/robyatt-audio-ak-mono-phono-preamplifier)
3) that reviewers should probably evaluate carts separate from SUTs due to potential SUT-cart matching issues. Or more ideally, that reviewers evaluating LOMCs should have the capability to test a LOMC cart BOTH with an SUT and without.