Got my Ray4 yesterday from a trade, the cheaper version of your Ray34CA. Sounds great, although the output is rather hot so it didn't play nice with certain pedals. It sounds like a Stingray alright, I'd be perfectly happy to leave it stock, but going to experiment with it nonetheless.
I'm fitting a 2-band Retrovibe Stinger EQ to it later today, then will think about pickups. Maybe a Basslines ceramic job, I really like the aggressive sound this has right now as it's unlike any of my other basses, and Alnico might mellow it out too much.
I also have a Westone Thunder with P and MM pickups and a 3-band John East Stingray pre. This one's going to get a set of flats, and maybe some vintage style alnico pickups and swap out the East for an Audere pre with the Z-mode switch and a passive tone control.
Hopefully I will then be happy with these so I can get back to playing with them instead of fiddling with them!