get rid off the big window - such a waste of space. replace it with a smaller window placed high up enough so you can move the sink under the window (or not) and have cabinets all the way around the back. then you do a half or 3/4 island at the front (just leave enough space to get in and out) once you get rid off the window, the possibilities are endless!

Wow! Looks great!

THanks for posting. The backsplash looks great extended to the end of the peninsula.