Vortex all the way! I purchased a vortex viper 6.5-20x44mm at christmas and put it on my 243. win varmint rifle for coyote and long range targets and it has worked fantastic. It has shot groups from 7/16" at 100 yards all day long and i have taken it all the way out too 500 yards without any issues. Best part is tracking is repeatable and reliable.
I just recently purchased a Vortex Viper PST
4-16x50mm FFP for my big game hunting rifle and i cant wait for it to arrive!! i shipped it too a buddies place cause im in between places so im just waiting to pick it up from his place!