When I had a tooth pulled a few years ago, I had the same choice - and actually, there are three choices, not two. I had my gap left as it was; obviously the cheapest option and also the least complicated. Of course, it wasn't exactly at the front; fourth from the centre. If it had been, I'd probably have taken one of your options Skeith.
Price is a good way of deciding, in my view. How much you want to spend making your mouth looking OK is a very pointed question.
MG