>>3285019I own a Pentax Spotmatic SP100 and a Ricoh KR-5sv. The Pentax is indeed a very fun camera to use, it has such a classic feel to it and the shutter sound is so satisfying, it's a mechanical beast. But I honestly like my Ricoh more it feels more erganomic than the Spotmatic, its lighter, slightly smaller, has a grip on the front and a thumb grip on the back making it very easy to hold onto even with a single hand where the spotmatic is a lot heavier and boxy so holding it requires both hands to get a good grip. The viewfinder in both cameras are super clear with a slight edge to the Ricohs probably because it isn't as old. The Ricoh takes Pentax K mount lenses where the Spotmatic take M42 screw mount lenses, both mounts offer great lens choices. For my Ricoh I own a single lens, the SMC Pentax-A 50mm f/1.7 it's a really good lens for all round snaps. For my Spotmatic I own a Tokina-Special 28mm f/2.8 and a Fujinon 50mm f/1.4, The Fujinon is absolutely beatiful wide open and the Tokina is very good for wide angle shots with little to no distortion. Overall I'd go with something that's completely manual, with a lightmeter, made around the 80s so it's not as big and clunky something like a Nikon FE2, Ricoh KR-5 Super II or any you've already mentioned.
