I already have one Ithaca, and it's wonderful. As wonderful as it is, I don't know if I need another one.
I think I could be convinced to try a Winchester Model 12 or perhaps one of the Benellis. Or maybe I'd go for something totally weird, like that South African upside down forward pumping riot shotgun with the two tube magazines. The Neostead, I think it's called.
I'd definitely choose an Ithaca, though, if I didn't already have one. It's smoother, lighter, prettier, cooler, and more ergonomic than the 870.
Katrina Guy, you are the only other person I have ever seen that has a problem with the 870's slide release being on the wrong side of the triggerguard.
That's one reason I like the Ithaca. It's the same style slide release in the same place, just mirrored on the other side of the triggerguard where I can actually hit it. I swear, it takes an act of John Moses Browning to put a slide release where I can actually hit it.
I don't think I like tang safeties. I've missed some clay pigeons since I didn't notice that the tang safety was activated, whereas I would have immediately felt the activated crossbolt safety on my Ithaca. Of course, to each his own.