I picked up a few Chris Davis 2016 Bowman parallels from Ebay recently. I wanted to go ahead and grab a few of his parallels before new products came out and I forgot to get them. I added this orange parallel, which is numbered 14/25 really cheaply. I think it looks the best out of all of the different versions that I have seen so far.
This gold parallel looks pretty nice. It is numbered 38/50. I didn't spend much on it either. I'm not sure what parallels exist, but I know there are a bunch that I have seen that I still need. I'll keep looking, of course.
Finally, here is the purple parallel. This is numbered 58/250. I hope he is included in Bowman Chrome this year. That will give me a bunch more parallels to look for!