My preference would be for the redeveloped Hillsborough. To keep the tradition and heritage would give us a real USP with so many clubs moving to new grounds. A new shiny ground now, becomes dated within 15/20 years.
I'd be open to a move if it was in the right area. Would be totally against an out of town/near motorway type stadium as they're completely soulless.
However, a new stadium in somewhere like Kelham could be incredible and a complete game changer for the club. A design in keeping with that area would be amazing. And just imagine the pub options.