I love my oakley surgitel flip-ups. Pretty much everybody in my class loves the loupes they have chosen for whatever reason.
I tell this to D1s and anyone else who will listen; the best pair of loupes out there is the one you feel the most comfortable with in whatever regard you feel is important.
clarity of vision/quality of lenses, magnification, standard vs. expanded field, flip-up vs. TTL, sports frame vs. standard, esthetics, price, weight, customer service, reputation, durability; these are all reasons why people choose one pair of loupes over another. Only you know what is most important to you. I recommend you try on as many loupes as you can get your hands on, preferably those bought by classmates so you don't have a salesman breathing down your neck, and decide what you like best.