I've got two of the Vortex Sparc II red dots from Brownells and two of the Vortex Spitfire 1x prism sights (don't know if you can still find these).
Both are very clear and I think the Sparc II is a great sight for the money. A buddy has a Trijicon MRO and while I'm sure it's more robust and the battery life is better, the glass has a blue tint, isn't as clear, and the red dot isn't as sharp to my eye.
I can buy 4 Vortex Sparc IIs for the same price as 1 MRO.
True. I think the high quality red dot sights use heavy tints because it works better and military will use lights or some sort of night vision.
However, for predator calling I wouldn't want anything with rubber button controls. Somehow a splinter got inside the button cover on a SPARC I had. The sight was not usable after that. Vortex sent a new one. I sold it.
