I can't help with countertops and you didn't really ask about lay out, but...if this were my kitchen (and it's going to be beautiful), I would skip the seating at the island except for the one chair at the end (for sitting to prep, or one person to hang out) or two smaller stools like herbflavor's pic and addna couple of comfy swivel chairs and a small end table in front of the fireplace. You already have a wonderful dining area and it looks like you want to be able to have people hang out closer to the kitchen (thus the bar seating). I think some upholstered chairs that would swivel toward the action in the kitchen, or to the table/view area, or to enjoy the fireplace/tv would be very inviting and allow chatting with the cook. That would give you much more space in the aisles to navigate around the kitchen.
Hope you find the perfect countertop.
Q
Great ideas
Q