I knew a guy a couple years ago in SoCal who was making $90K, which I think made him the highest paid Westwind pilot in the country. It didn't last though.
I was making far far less, in fact I'm pretty sure I was the lowest paid Westwind pilot in the country. That didn't last either.
As far as 91 operations go, it's what you negotiate. I don't think 135 operators in SoCal pay anymore than 135 operators in Texas. Ask for 90K and see what kind of a counter offer you get.