OT, I'm getting Sirius, even if I have to buy myself a Christmas present. A buddy said they have some great rock & roll channels, and I can't wait for the Bubba Clem/Howard Stern war to break out!
I bought an XMPCR (XMRadio for your computer) last year and love it. I always get a 100% Ground Signal and it's very small so I take it when I go on business trips and just put it next to a hotel window - plug it up to my laptop - and I got decent music to listen to while I drool over GZFX.
I'm not too big on specific radio shows (like Howard Stern) I just want good music with good variety and XMRadio gives me all the hits I want, alternative, and classical to keep me happy.