What the fuck is arc..never mind.
yep, drew, they're from boston.
Now go listen to panopticon straight through, understand its not a grab-bag of songs and is designed to flow as a single piece of writing, and fall in love with it, immediately :P
Oh, and further listening: Oceanic next. before that was very, very different. Much more doom influenced (though not actually doom by any stretch), and after that was pale imitation of oceanic and panopticon.
If you want an ISIS fix outside ISIS, its gotta be Russian Circles, imo. They are, come to think of it, all things considered, better than ISIS (or I like their whole catalogue more), but little to nothing tops panopticon as a standalone album.