Find 2, 3 or 4 good tile showrooms in your area and go take a look. Different stores carry different porcelain tile brands, so it is worth expanding your search.

What area do you live in? Happy to recommend good tile stores in the LA area.

I had the same desire and selected the attached:

I had the same idea and used the attached -

https://www.flooranddecor.com/porcelain-tile/carrara-matte-gray-porcelain-tile-100129253.html#q=carrara+gray+porcelain&start=1

I couldn't be happier. The price was fantastic, too. And I have real marble in my kitchen so I know what it looks and feels like. The bathroom is almost done, I'll send pics next week.

I considered using either Vallelunga Statuario (the honed finished was lovely) or Vallelunga Calacatta which I saw at Virginia Tile (both V3 variation and around $9.56/sqft for the 3x12" size that I was contemplating doing in a herringbone pattern on the floor). In the end, I decided to go a different route (no marble or faux marble at all).

While at Virginia Tile, I also looked at Anatolia Mayfair Statuario Venato and Volakas Grigio ($5.85/sqft for the 4x12" size) but I think it had less pattern variation (only V2). Virginia Tile had tons more faux marbles (some probably cheaper and some perhaps more expensive) but those were my top faves in my budget and they came in lots of sizes and shapes and all were rectified.

At MidAmerica Tile, I only liked either Bianco Statuario or Calacatta Shine (or maybe both) from LEA Ceramiche's Dreaming line (V3 variation and a good price at $7.50-8.50/sqft depending on matte or polished. To me, the polished looked much better). The sizes these came in were much more limited (I would have done the smallest size 12x24") and I'm not sure if they were rectified.

http://www.vallelungacer.it/collezioni/calacatta/?lang=en

http://www.vallelungacer.it/collezioni/statuario/?lang=en

http://www.anatoliatile.com/content/uploads/Mayfair_HD_Porcelain_Tile_Print.pdf

http://www.ceramichelea.it/wp-content/uploads/2015/06/LEA_DREAMING_LUX_0214.pdf

BTW, I live in the Chicago suburbs. We have The Tile Shop and Floor & Decor nearby and some smaller local tile shops. F&D did not have anything I was interested in for the current project. I've bought a couple things from them for another project and found the faux marble did not have much variation and I had to dig through boxes to find mesh-mounted mosaics that weren't badly chipped or missing tiles). I did actually like their 12x12" real marble that I used a few pieces of for a shower niche and shower threshold. But I liked it in comparison to the marble that Home Depot had on the shelf, so relative to that, I thought it looked good and was priced well.

The Tile Shop always seems a bit overpriced to me for what you get (a lot of the faux stone tiles are not very realistic or there are no trim pieces for the tile I like, etc.), so while I've looked there, I've never actually purchased anything. There are some local non-chain tile shops that I've visited in the past, but it was worth it to us to travel a little further to what is apparently the tile epicenter of our area (Elk Grove Village) to check out Daltile & MidAmerica Tile. And then Virginia Tile was sort of nearby in Wood Dale and they have everything from more budget-friendly lines to Pratt&Larson. Some of their tile does have a lead time though. FWIW, Virginia Tile even had a sample board for Crossville Virtue which is another faux marble that happens to come in a 2x2" hex mosaic. I had once visited a local tile shop that carries Crossville to look at Virtue but they had no sample board for the Virtue line. I guess it's not popular?

Kristin, do you have a picture you can post of your bathroom faux marvel? Thank you!