Cross-posting with bathrooms because I need advice/suggestions today. Sorry and thanks!

I need to nail down my bathroom decisions on my new build. In the first pic below the top two samples are going in the master bath, the bottom two in the guest. In the second pic they are together and the top left are guest, bottom right are master. They are resting on a sample of Cambria Whitney. At the bottom of all the samples is the silvery-gray floor tile. Espresso cabs with stainless and BN hardware.

Both bathrooms will have the tile run vertically and alternate field tile with accent glass.

The guest bath tile is Kimono Silk (Morning Dove 12x12) with glass tile that will be linear, not the mosaic as shown. Those colors, but linear tile. This accent tile has white, taupe or griege, and gray glass.

The master bath tile is Fabrique (Blanc Linen 12x24) with the glass tile. Again, I won't be using the squares but will be using linear tile. This accent tile has carrara marble, clear glass, and mirror-like reflective glass.

Undermount sinks in white:

Guest bath - 42' wide vanity:

Faucets - touch sensitive in Stainless:

Figuring out a countertop has been excruciating for me. I have trouble mixing and matching. (Kitchen granite BTW will be Alaska White.) I had decided to go with Cambria Whitney for the countertops and BS, then I decided on Carrara Marble for the countertops and backsplash. I don't have a Carrara Marble sample here, but have been living with the samples as pictured on my dining room table. They have grown on me and I'm thinking that the Cambria may be better. I won't have any marble in the house except in the accent tile that is going in the master bath.

So should I go with:

1) Marble vanities? I think etching may really bother me.

2) Cambria Whitney vanities in both? Initially I thought it was too "fun" and "playful" for the rest of the house, but it has really grown on me. It has little mirror sparkles that are hard to capture in the pics.

3) Marble in master and cambria in guest? (I had planned to keep the the same so there was some consistency between the bathrooms but that is certainly not necessary. But the marble might work in the master because of the marble in the accent tile.)

4) Some other idea? I have thought of just doing white countertops and then using the accent tile as the backsplash also.

5) The accent tile as the backsplash or the countertop material?

Help! I'm driving my designer and builder nuts. Well, and myself too. It is SO hard to select EVERYTHING before the foundation is even poured.

Thanks.