Help!

Our kitchen remodel is being held up by a wingle window- the builder can't submit for permits until we have the window dimensions. My designer has suggested going as wide as we can (80") but I am not sure I want to go that wide. The window will face the neighbors house, about 30' away. We can see the woods out back and gardens out front but the majority of the view will be the house and/or whatever trees we plant in that space. Wintertime will have a drastically less pleasant view. There are no plans for wall cabinets on the ~20' long window wall but there will be a peninsula sticking out about 2/3 of the way down the wall with the 2/3 being floor cabinets/countertop.

So---

Are there guidelines for sizing a window/windows? Examples which come to mind:

1) As wide as the sink. Our Sink will be ~36" on a 36" cabinet.

2) 200% sink width so that it is 50% wider than the sink on each side

3) Far side of the dishwasher (adjacent to sink) to equal width on opposite side

4) ?????

Our designer has moved on to other projects, probably out of frustration with my picky detailing.

I think the attached image has the wrong size sink base.

Any help greatly appreciated!