We currently have the Midwest Habitat. It meets the size requirements for one or two pigs, and it's expandable, so you can make it as big as it needs to be.
That said, we are going to upgrade to a c&c when we move in about a month. I do like the MH cage, but the lid is difficult to get on and off, and it can pinch fingers (my 6 year old got caught in it once, and it was not pretty). Another problem we've had is that one of our pigs can climb out of it easily (she's Houdini), but I'm not sure she'd be any better contained in a C&C, lol. I just have to make sure we keep a lid on any cage she's in. A plus to the C&C cages is that you can customize them and really make them your own. The MW Habitat can be expanded, but customization options are more limited (you can't build up, for example).
I found our MW Habitat cage for $50 on Amazon.