Hello. My name is Chris Austin, and I also live in the Metroplex. I have been reading this thread and thought I would chime in. Sorry I took so long, I don't get on line much sometimes as I travel for work as you do. I also am an Engineer (aircraft) and my background and experience sound similar to yours. I was into motorcycles for years, but decided my chance of getting killed was more important then the fun of the sport. I decided to find a safer substitute, and the Seven fits the bill perfectly.
I agree with basically everyone here, and the bottom line is what you want in both the build and finished car experience. There is a difficult balancing act here for most people, between time, money, and personal preference i.e. looks etc., with time being the most important for myself. Which of these wins out is up to you, just remember that your choice my change later! My choice for a Seven was fairly easy (at the time) to make as I also wanted domestic parts and wanted to deal with someone local, and both Dick and Brian fill that bill. I live just a few miles from Brian. I would not hesitate to deal with either one and have, and will do so again.
I personally have both a completed S2K-R (Goldie), and a different version of the S2K which looks more like a traditional Seven (Pearl). I would be glad to make either of these available for you to check out.
I also have the first production LM body to look at, if you are interested. This body will fit on an S2K to make a very different car, but you can always take it off and go back to the classic look. 2 cars in one.
If a little more power is called for the S2000 supercharger kits available will bolt on the S2K and boost power a bit. I also have one of those to look at. ;-)
It sounds like you already talked to Dick, and I agree that you should check out his products also. I would gladly own a Birkin and hope to do so myself.
If I can help in any way, please let me know.
Chris Austin