My Lyman Mustang wears a Leupold VX-II, 3X9. Three years - no problems. It's a Leupold, what's not to like?

My Omega X-7 and three of the Renegades wear Simmons 4X ProDiamonds. Oldest one is three years. Newest one is six months. No problems. Clear, sharp, compact size, inexpensive, lots of adjustment range, though as nails. All the scope you really need out to 200 yards. When I clean the Renegades I remove the barrel from the stock and the nipple from the breechplug, then dunk the breech end - scope and all - in a bucket of water to pump the bore. Haven't had one leak or fog up yet.