There's no reason that scope wouldn't work on an '06. So, if that's what you want, go for it.
There are some real good deals around right now. Several companies are changing their lineups and offering discounts.
The Bushnell Elite, Elite 4200, Vortex Viper, and Nikon Monarch are a step up optically from the Buckmaster.
The Bushnell 3200 and the Burris Fullfield II are direct competitors with the Buckmaster.
If you want to learn some stuff about scopes, find a website called 'Optics Thoughts' and read up on the subject. The author of that site posts here often.