Mick, like our fellow correspondents I wish you the best in your new enterprise!
Having been a designer for longer than I want to think about, I have a really off-the-wall idea regarding movements. Sure enough, ETA is a good yardstick that we can all relate to, but looking at boutique makers such as Touby, if I were to get one I would insist on one with a restored vintage movement instead.
There are some firms using restored vintage movements, or NOS movements from other manufacturers, and make a point of it. Thinking out loud here: if a watch of modern design - around 38mm diameter - housing something like a restored and decorated Raketa 2603 (such as with all screws polished and blued) with a display back, it might be intriguing!