I prefer Leupold. I have used them for many years and they have been trouble free. My next scope purchase will likely be a Leupold but I plan to give the Nikon Monarch, Weaver Grand Slam, Bushnell Elite 3200 and the Sightron SII a good look before I buy. I purchased a NIB Leupold VXI for a muzzleloader last year from ebay for less than 100 bucks, so keep your eyes open there. Also check out the optic zone...they have great prices:
http://www.theopticzone.com/