1) I've read through quite a few posts re "shades of gray" grout and thought I had it narrowed down - either Fusion Pro's "Platinum" or "DeLorean Gray". Then I ran across a boatload of unfavorable reviews re the quality of Fusion Pro. So, is it that bad?

2) Our nearby tile store carries Mapei products so "Frost" or "Warm Gray" could be possibilities.

3) We're using white subways with an insert of gray penny tile on the bathtub surround and a light linen-look tile on the floor. Since the penny tiles are pre-spaced, their grout lines will be larger. Fusion Pro only seems to come sanded. Shouldn't unsanded be used on the wall tile? One of the pro's mentioned he only uses sanded on mosaics. Would the pennies be considered mosaics?

4) I was hoping for a 1/16 grout line on the (4x10) subways, but was told by the tile store's designer nothing smaller than 1/8. The floor tiles will be 6 or 9 x 19, rectified porcelain.

5) My color preference leans on the lighter side, especially if the grout lines are bigger. I played with the Fusion Pro. The DeLorean seems to blend in with the penny tile - Platinum looks better.