I like the longer ones best. If tiles are your preferred choice, I think a white tile that has a nice polished texture look, looks great in a kitchen. With great lighting, the light bounce's of the angles and the stainless steel appliances at night and gives a bit of bling and expense.

Kerlite and Maximum are the only two that spring to mind at the moment.

I have the same question really, except I know I have to have laminex and don't know which would look best. We live in the country where it's hard to inspect sizeable samples in situ

Great job on the kitchen and I agree with some of the former comments - a glass splash back would look good and the silver seems a good choice. If you decide to go with tiles I would suggest a White Tile with a smattering of Black and Grey markings with the colors prominent not subdued. I wouldn't think Brown but why not experiment with a few different colors and see how they look and in conjunction with other colors until you come up with a match. Only a small area but nice to get it just right first go. Good luck