^Wow... First one to reply.
Here's my two cents, just looking at the renderings... First one is blah (this building shape seems overdone personally... reminds me of IFC in Hong Kong) and second one is ridiculous (maybe the renderings don't give it justice, but it just looks silly... reminds me of Sutro Tower or some moon rocket...)...
Now the third one looks positively stunning (the last rendering has me salivating), but I imagine a lot of engineering will go into making that building stand...
To be honest, I can't wait to hear what the "public" has to say about the renderings, but at the same time dread it, knowing that everything in the book will get thrown at the tower by the anti-Manhattanizers, the "vista preservationists," and the custodians of "quaint" San Francisco... And that, thanks to them, the tower may get chopped down to "acceptable dimensions" just like the TAP.