Never owned a Vortex and have never even seen one in person but they seem to get rave reviews from those who have them. My concern with Vortex is will they be around 10 years from now should you need customer service?
I have used one of the older Monarch UCC's from Nikon and it was an excellent scope. Have read that Nikon's customer service can be suspect at times but I never had to use it. My Nikon was clear and the adjustments were accurate.
If it were me though, I would seriously consider the Zeiss Conquest that Sheridan posted a link to. A lot of scope for the money.