This is not what you're asking, so I apologize if I am sidetracking your thread here.

Are you planning to waterfall both ends of the island counter? Or are you planning to waterfall just the end near the range?

If you're only doing the end near the range, I would recommend that you re-consider that part of your plan. The point of a waterfall is to be seen, and it just wouldn't be seen on the end by the range.

You should select your paint for the cabinets after you finalize the selection for your counters. That way you can select something that goes well with YOUR slab.

I agree with above. Get your countertops installed before you decide about paint. I am afraid, its going to be a bit boring with with beige or taupe. You may decide that the white you have is perfect for your new look.

Pick your slabs, as Taj can be creamy, tan, gray, green, or a combo of all of the above. Once you have your slabs picked, then you can decide what color compliments it.

That traditional kitchen will just look really weird and silly with any attempt at waterfalls or a full height splash. Gramma doesn't look cool in Kendrick Lamar's flare bottoms, even if she once wore the bellbottoms long ago. Save your money.

Why are you replacing that with something that is very very similar to it? There's no point in spending 40K on new counters in that kitchen. Not unless you change everything else in the kitchen first.