I would go with the Bushnell 4200 Elite at about $299 (you maybe able to find it a little cheaper).

http://swfa.com/pc-7280-185-bushnell-3-9x40-elite-4200-rifle-scope.aspx

You can get a $125 free camo jacket with the purchase of any Elite product right now.

http://www.bushnell.com/special_offers/rangefinder_rebate.cfm

You can pick up a nice Nikon Monarch factory refurbished or other scopes in your price rangehere:

www.samplelist.com/default.aspx?prod_type=1&hide_sold=False