which should i get the moto h500 or the moto hs850?

Well, you asked so I'm gonna tell you........neither!

In my opinion, Moto headsets just don't have ample volume.
The volume may seem fine while indoors, but once your outside
or driving, it's just not loud enough.

so which would you recommend?

I use the Jabra JX-10 with my 8700c.
Works flawlessly and I couldn't be more
pleased with the performance of the Jabra.
I know some really like the Moto headsets
and I wish they would have worked for me.

did u get the jx-10 for 99?

I paid $129 but I'm sure they're cheaper by now.