Back Fusion? Good Idea? Disc Replacement anyone?

I was hit by the same car 5x…Did I mention I live in Vegas?

I am now scheduled to have my spine fused because I have 2 herniated/bulging discs. Even though they do not look super bad - the fact that my ligaments are not stable prevents me from staying out of pain for more than 5 min at time. I am scheduled for a fusion Jan 12, however, I am not seeing great reviews on EDS patients :( I want a replacement but my surgeon says it will just pop out.

Anyone have good/bad experiences with either surgery?