Writing a web app on a sane platform

I'm going to write a rather complex web application. I was originally planning to use PHP, but I have come to the conclusion that it sucks dicks.

So now I'm looking to find a saner webdev platform. In addition to PHP, I know Haskell and Python fairly well. I'd love to use Haskell, but I'm not sure what tools for web development are available, and whether any of them are any good. On the other hand, I've heard good things about Python regarding webdev, and presumably I have a wider range of choices and better community support here since Python is quite a bit more mainstream.

Does /prog/ have any experience and/or opinions regarding this? Things I need are basically session handling and database connectivity (MySQL will do, although more generic interfaces are always a plus). A simple template system would be nice too.

PS. Ruby on Fails is not an option.

Do you have a specific problem with PHP or are you just not bright enough to figure out the installation? It's quite an adequate platform as long as you get to configure it yourself.