I can get the CompC3 with covers for $370 shipped, but then I need a mount. I can get the 517 for $395 shipped, and the XPS for $418 shipped. This is for my Midlength AR. I've shot Eotechs before and really like their reticle, but have not shot through an Aimpoint. I know some of the older Eotechs had issues, but from what I've read, the new ones are good to go, and everyone seems to love the XPS. Thoughts?