l got the 3-15, it about as good as it gets in that price range.
Theres 3 solid options for ffp at that price. The weavers, the vortex psts and the bushy tactical ffp. I have owned all 3, the best glass was a tossup between the bushy and the weaver.
The pst has the best reticle. The turrets were good enough on all of them though the bushy takes a little getting used to.
The bushy and weaver are built like tanks, the pst doesnt seem as robust.
The only real downside to the bushy is its reticle is only offered in standard mil dot.
There all 3 really good for the cost.
BTW, l dont know if you can still find them or not but l got the bushy 6-24 onsale for 649 a few months ago, it a steal at that price, l got the 3-12 for 549 as well.