I really like my Surgical Acuity Loupes. They are lighter weight and have a larger viewing area than the "traditional" Buddy Holly style loupes that most attendings have. I got mine through a local sale representative and he came to measure me. They will also let you change out your focal length during your residency (i.e. you can change 2.8x mag for 3.5x). So, depending on what you want to do, you can keep your options open.
Call their customer service department and ask who the local representative is in your area.
www.surgicalacuity.com/
888-822-8489
They set me back $1,000.