Spotting Scope Comparisons????

I am looking to buy a new spotting scope in the $220-$300 range......I haave looked at the Leupold WindRiver, Burris Landmark, Nikon, and a Bausch and Lomb.....What are the opinions on these spotting scopes.....Has anyone had good luck or bad luck with any of these???? Would appreciate any and all your comments........