There are some serious veteran classers on this forum. They will give good info. But, the most serious glassers are paying $2k for their glass.
Depends on your style of hunting. I can't imagine not having a 10x42 on a bino strap. Also, if you are glassing for deer from 0 to 3 miles, you should have 15x on a tripod. If you can't sit still long enough to class off a tripod, you should have at least a 10x42 around your neck. I can't think of a reason for having a 12x50. Too heavy to wear all day.
As for brands, the good stuff is $2k. After that, I have heard good feedback on the Euros and Vortex.
I saw a lynx at Tejon.