We went over this a few days ago. The 34mm rings are made in US, the 30mm are made in China. I assume that image you have there is showing a set of 34mm rings?
Scope height is an individual thing. Many people, myself included, would benefit from a lower (~0.850-0.900") option.
Well, wherever Burris makes them, there is no other ring made that gives you the options they do, so I will continue to buy them.
