Kohler Whitehaven farmhouse sink is the way to go.

http://www.us.kohler.com/us/WhitehavenSelf-Trimming-35-11-16-x-21-9-16-x-9-5-8-under-mount-single-bowl-kitchen-sink-with-tall-apron/productDetail/Under-Mount-Sinks/428755.htm?skuId=414298&brandId=433000&isSeachPage=true&pageName=globalSearch&hash=id%3Dfilters%26startIndex%3D40%26scrollTop%3D417

Can be used in existing standard cabinetry.
•Installation is simplified.
•Tight tolerances allow for a template with 9” apron, not needed for 7” apron.
•Self-Trimming feature eliminates extra finishing steps
•2 degree slope to an offset drain eliminates water pooling.
•True apron protects cabinet in case of over running water.

Material Benefits
•Durability –guaranteed not to chip, crack, or burn.
•Robust warranty.
•Nothing is easier to clean.
•More color options
•Made in USA
•Made of 80% recycled materials

i went with the whitehaven- thanks!