Dragon, you have many good choices given and I am sure anyone of the suggestions will sound quite good. In terms of your confusion with the email sent to you, well please consider a couple of things from the builders perspective.
Stating a small group of folks purchased the Dude is really not true or accurate. Actually many have been sold each year for several years, but most owners are music lovers not inclined to spend time here as I do. Your post also suggests just two people do his marketing ( pointing to me) when of coarse I am not at all their marketing arm, but simply an active and passionate audiophile who posts regularly on many subjects.
When you bring up things like scams, no internal pics, displeasure with this and that one can certainly understand the builders concern and caution.
Many preamps have no internal pics . You won't find any on the fine Coincident and many small operation products. This is common. In addition, it is common for a company not to loan out amps or preamps on trial that take one person weeks to make. My goodness how or why should a one man operation do this. Surely such an offer is not reasonable on a 70 pound labor of love that requires weeks of preparation.
Lastly, no I am not angry and certainly he has many, many owners besides me and other posters who love his gear and enjoy Paul's service. His world is far bigger then me and the posters here and I understand you would not know this.