I bought 2 IOR's and various other gadgets from Jim Maloney @ Quality Optics. He's an out standing person to do business with and the only guy that I would buy an IOR from.
Nothing wrong with some of the others, but I know Jim personally, and can endorse him 100% before AND AFTER the sale is complete.
The scope in question, the IOR 2.5-10x42, I have owned previously, and thought it was very good. In a word...TOUGH!!!
Mine was the tactical model, and you may be referring to the hunting version, and I'm unqualified to comment on that scope model in particular.
I thought the eye relief was a little short, but others have not concurred with that assessment.
I have always thought that IOR made a great tactical scope, but never was crazy about the hunting scopes. The fixed power IOR's are one of the best fixed power's out there.
Go with Jim...sakofan....