I try with every ounce of my spirit to make it out to Del Frisco's whenever I'm in Vegas (and sometimes even subconsciously organize trips there for the sole reason of hitting it up) and my most recent visit last week did not cease to please me with the salty fatty goodness of a proper porterhouse seldom attainable in my hometown of SF. Most of the group went with the various filet mignon cuts offered (including a sampler special), and while I wasn't quite hungry enough to get the full double eagle (32oz), the classic porterhouse was done up just right, a red but not bloody medium, and delicious sides that are wholly unnecessary.
Last time I was here was the first time I ate (and had room for) dessert -- we had the molten chocolate cake. Very decadent but not overdone, and served with a scoop of ice cream to play off the warm of the cake and provide light contrast visually and flavorfully. Nothing amazing compared to the steak, but nice to split if you are in the mood.
Note: this place cooks their stake on the rare side, so usually it's a good idea to kick up your preferences by a point (i.e. get medium if you usually prefer medium-rare).