I feel that if you want an aircooled a typeIV is king but a Type 1 for me has too narrow a powerband and torque band.
Now A subie just oozes torque and mated to their tranny is really a very nice experience but I guess I left the purist camp a while ago
I keep looking at doing a KG, and Rich Drewek with full Mandeola has got a nice car but ... there is the proverbial but, would I have any time to drive another car and take care of it? I just added a BMW R100RT (84) bike, bought from the original owner with full specs and log of repairs and maintenance that I am enjoying. I use it for short pleasure rides, after many years not in a 2 wheeled saddle.