Personally, I don't think that twin towers are going to stand out in Las Vegas at all. Think about it, twin towers would look like just another condo complex, despite the height, and a single tall building would look just as good, if not stand out more. Also, I want to see if the design will change with the height change, because I hated the 1,888 ft. design.
"Also, to be frank, I like dense cities best and care about them most." from The Death And Life of Great American Cities by Jane Jacobs.
BUILD IT. BUILD EVERYTHING. BUILD IT ALL.