This is driving me crazy but it is a short trip LOL. I am going to buy one in the next week but can't decide which one. Tracking is the most important next retical and then glass my eyes are so old I don't think I can really appreciate the difference . Price is third because when you are spending over a grand what's 300.00. I need to hear from people who actually bought one of these and have some time behind them. Please help an old fart who is thired of looking at all the reviews and still can't make up his mind.