What city would make a good stand-in for Ankh Morpork?

[Wolfwaker]

I am thinking about running a PbP based on the City Watch in Terry Pratchett's Discworld books. They keep order and fight crime in a gritty and industrious urban environment. It reminds me a bit of Victorian London. I would like to fit it in to Golarion since people are already familiar with the different deities, cultures, etc. Is there a city that has a published source book that would make a good fit? I plan on allowing a lot of unusual races.

I have the Kaer Maga book (City of Strangers) but parts of it are a bit too dark and gruesome for me. I guess I could work with that and tone it down. But I'll take other ideas...

[Lloyd Jackson]

Absalom perhaps? Huge city, considers itself the center of the world, innumerable factions only tenuously held together.

[Fabius Maximus]

Definitely Absalom.

[Charles Evans 25]

Absalom was my first thought, but Katapesh was a very fast second; Katapesh has the pactmasters after all.

[Wolfwaker]

Hmmm, the pactmasters are interesting but Absalom sounds pretty good. Thanks.