Chicago is a fucking cesspool of borderline criminal politicians (and some actual criminal politicians). And yes, if they're from the Chicago area, damn near all are insane anti-gun...and I mean INSANE. You should read the shit bills they propose every year, some of them are bonkers. The rest of the state is pretty conservative and pro gun, they often keep Chicago in check.
My wife and I have seriously talking about moving within the next 5 year should the economy hold together. We've had it with this state for many reasons and Chicago's politics are a major reason.
I am an NRA member btw...
I've spent time with both and still prefer the 870. My suggestion, try to pick up a used police model (forged internals) and replace the stock. You can get one hell of a deal on them.
I think I found a link to one on Google but their sight isn't responding at the moment...
http://www.remington.com/products/f.../model-870-express-synthetic-pistol-grip.aspx
On a side note, pistol grip only shotguns suck...beat the holy hell out of your wrist. I will not shoot one again if I can help it...