I put a Pro Diamond On my gun last year too. I Love It. Like you I considered spending some extra money and Getting either the Nikon or the Pentex. But Man them things are not cheep. I killed my bird with the simmons last spring. I shot a ton of rounds through my gun testing diferent loads and the scope held up great. No problems. I love the Diamond Rectical too. The bird I got last spring was out at about 40 yards. The yardage looke iffy untill I looked through my scope and saw he filled up the Diamond. meaning he was within range. I dont think you would be disapointed with the simmons. I did however put camo tape around my scope after I mounted it to make sure it wouldn't give off any glare. If only they made them Simmons in a como pattern.