3-9x40 is my favorite by far. I've actually had good luck with Bushnell. The ones I've used adjust easily and hold zero. I just bought a Vortex, and I'm not too impressed. I only got 2 1/2 range sessions out of it on my 300BLK, before I had to take it off and mail it back. I guess I'll find out how well that VIP warranty works.