Well, do you use the defroster? If so, I think I'd want to be able to use it. There are kits (conductive paint) that allow you to touch-up the grid. A tint/glass shop could fix yours (and do it well) for a lot less than new glass, don't ya think?
I have a hatchback car with no rear defroster. It really friggin sucks. I used something similar to CPU fans in the corner of the rear-window to blow air across the glass (powered by the defroster). Otherwise, I was screwed on cold mornings. Just in case that sways ya towards fixin it.
Random thoughts.
Good luck.