Look at the specs for Toto toilets on this forum. Just go to the top of this page and click on "Toilet Reviews". Then "Shopping" followed by "Toto". You should also be aware that Kohler toilets are not highly recommended by plumbers on this forum. MAPP ratings are often over emphasized, and and any thing over 500 is overkill. If your rough-in is 11-1/2" from the finished wall to the center of the flange, most 12" rough-in toilets will fit. If you moved the flange to 10", you would greatly reduce your options on toilets. A Toto is definitely the best toilet brand regardless of the model you select.