So I've FINALLY selected an 18 x 18 carrara venatino marble for my master bath floor. Countertops and shower bench will also be Carrara, but I'm still struggling on the shower itself. There will be an accent tile and shower floor in a white thassos/ming green marble mosaic, but I'm deciding between white subways in a running bond below the accent and then matching square tiles set on a diagonal above it OR doing the same marble as the bathroom floor ion the shower walls (12 x 12s set straight below the accent and 6x6s set on a diagonal above it). The background on the marble is pretty white so I'm not worried about the match with the thassos. I like the look of the subway tile, crisp and clean, but worry that it might look less 'luxe' than the marble (even thought cost is comparable). Also wonder if the smaller format on the subways looks too busy in a sizable shower. I'll take any advice/thoughts/two cents you have to offer!