I'm kind of thinking of buying a Sirius home unit and then ditching cable TV. I still have a 30 foot aerial mast on the roof, I think I just need to replace the rotator (about $100). I live almost halfway between LA and San Diego, so I could always get stations from both cities (back when the rotator still worked).
About the only thing I watch on TV anymore is FOX (D'OH!), which I could get using the aerial. I find I much prefer the radio dramas on Sirius than just anything on cable TV. I think the only thing I'd miss from cable would be the History Channel. And the $45 a month cable bill.