Will I regret going digital?

[opus]

I don't think you'll regret it, unless you have a real love for certain films like Velvia or something. If you're in love with a film, you'll probably not reproduce it digitally to your satisfaction. Otherwise, digital is the way to go, and as time goes on there will be less and less support for film, making it harder and more expensive to keep it around.

[Loupey]

Will you regret going digital? I dunno, it depends on what your expectations are.

As for selling the film bodies, they probably won't fetch a lot of money so it may not be worth your time. But if you haven't used them in 5 years, that should tell you how much they are worth to you. Meanwhile, digital has evolved a LOT during those 5 years.