I had an older 3x on my rifle and like it better than the new version due to a bit longer eye relief on mine. The 3x has a larger eye piece, which may be of benefit for some folks but if the 2.5 is set up correctly there is not much to choose between them optically. The 2.5 is a little lighter weight, smaller and cheaper.

Phil Shoemaker
Alaska Master Guide,
Alaska Hunter Ed Instructor
FAA Master pilot
www.grizzlyskinsofalaska.com

Anyone who claims the 30-06 is not effective has either not used one, or else is unwittingly commenting on their marksmanship.