I still have my old Asahi Spotmatic IIa from when I purchased it while in the Navy. It came with the Tak 55/f1.8, and several years ago I picked up an AutoTak 85/f1.8 too.
I would argue that we already have the closest thing to a Spotie digital equivalent as we are likely to get. The K5 family. Excellent sensor, can do pretty much everything. They do have their weaknesses in certain areas, but its a good sensor size, very capable, excellent DR and IQ, implemented in a pretty wide model family (K5, K5II, K5IIs, K500, K30, K50, and the K-01). They are as plentiful and as inexpensive as you can get.