Invisalign Vs. Braces for Overbite Problem

Hi, I've been unhappy with my overbite for years and was pleased to hear that my dentist recommended Invisalign over braces! He knew I was hesitant about wearing braces but wanted to fix my smile.

I consulted with an orthodontist couple of years back who recommended braces over Invisalign. In fact, he advised against Invisalign for my situation! I asked my dentist why he and the ortho had different opinions about it and the dentist mentioned that most orthodontist feel more comfortable w/ the traditional braces and hinted that the financial benefit was greater on braces for the ortho office.

Would you recommend I get a second opinion? I fear that my dentist may have $$ incentive to recommend Invisalign so I'm hesitant to sign up for this long, and costly process. Advice please? I've asked to see the before and expected after images and they will check w/ the Invisalign folks if that's feasible free of charge...