Hi Car57,
I am also in the process of remodeling my master bath. I have found tile stores to be extremely helpful even when they know you're not ready to buy. Go in with a budget in mind and bring any samples you have (paint, wall paper, floor plan and elevations). It can be helpful to bring paint chips of the colors you would like to have somewhere in the room. Most showroooms will pull out a good assortment of things to look at and then leave you to browse. But the ones I have been in have been reluctant to disclose the manufacturer so you won't try to shop for a better price online. It can be overwhelming but you can usually take home some samples and see what they look like in the room. Good luck!

We too were overwhelmed at first, and even brought home a couple samples of porcelain tile that looked like travertine. But we kept going to tile shops (about 4 or 5 I think) before one mosaic grabbed my attention. After that we brought that sample everywhere we shopped to see who had other tiles that would go with it. All our tile in our new bathroom didn't come from the same store. And be sure to get a large enough sample of the quartz, not just those little 2" pieces.

-Babka