Best replacement for large quantity of DVDs?

I'm not sure what you're asking. You have a large collection of porn on dvd and you want to replace it? I feel as though there's more to this than you're telling us.

None really.  Think of time required just to transfer all that junk.  I've got a few hundred of these things and there's no way I'm going through all that 

A movie  streaming service or a SSD full of movies.

A large quantity of Blu-Rays.