P Mitra,,,another option,,,,,if they don't have exactly what you love, then get the cheapest laminate counter option. after you move in, go look for the counter you love. Builders gouge the buyers on these kitchen installs. what they tout as premium, upgraded granite, really isn't. it's usually builder basic entry level. and they still charge you far more than what you could do yourself. I'd wait and do it myself, if possible. If it's already worked into your house payment, then I guess you're stuck. but if not, I wouldn't pay them the extra to do it.

Love the dark cabinet color! Are you going to repaint the island? I'd go mostly white on the backsplash maybe a fun shape tile like star and cross pattern, 2x8 herringbone or H pattern.

"modern farmhouse" style is pretty amorphous. Plus it doesn't have to be a particular style, as long as it suits the rest of the house and works well with your furnishings. If you find yourself gravitating to blue -- which works well with gold, and brass (real brass, not eighties brass lol) -- do it, and don't worry about pigeonholing yourself into a particular style. The added bonus is that the modern farmhouse trend has been around for a while and is on the way out. You don't have to tie yourself to something trendy -- that's the other secret to achieving timelessness : ) .

Posting photos of your space will get you more responses