I need some new glass for my 6.5-284 and my 7rum and have been looking at the 6.5-20x50 and 8.5-20x50 leupies, and the 6-24x50 and the 8-32x50 burris. I want target turrets and have had good luck with both brands in the past, but my vx lll's have better glass than my signatures do. Do the black diamonds have better glass than the vx lll's?