I 2nd Lands End Canvas for a cheaper version. If you want to upgrade it, you can buy some MOP buttons and have those swapped out for the crappy plastic ones they put on. For the grey shirts, you can put in smoke MOP buttons; I think those look better on that grey.
The J Crew shirt that was linked above, however, I think is much more stylish than the LEC offers. If you have the money, however, I'd go with the RRL. Only do LEC if you're on a tight budget. You only need one of these, so it might as well be a great piece.