If you are steak connoisseurs, the only real choices you have for top shelf steak on property are Shula's at the WDW Dolphin and the Yachtsman Steakhouse at the Yacht & Beach Club. Several of the other restaurants have excellent steaks but are not steakhouses, so their cuts are fairly limited (e.g., California Grill does a wonderful filet, but I believe it's the only steak dish on the menu). Contrary to what many will say about Le Cellier, the steaks are no better than what you'd get at an Outback or a Longhorn (and they are significantly more expensive than those neighborhood type places).
Shula's is a very adult-oriented restaurant in that it is dark, panelled, gilt-edged, etc. It has a distinct football motif but it is understated (other than on the menu). It's expensive, but the steak is definitely worth the money.