I have Sirius Kenwood Set-up in my Accord via the factory head unit, (using a KCS_R70FM controller) I will be switching to a Sirius-Kenwood head unit this spring and building a system.

I have the antenna inside my car next to my third brake light works perfect, I have the same set-up in my S-10 but the antenna is on the roof, the performance is equal.

http://members.cardomain.com/mr_chad

check out my install of this simple kit, it was easy: Sirius has a promo currently this entire set-up can be had for under 100bucks.

I love Techno and Sirius has more Techno channels then XM and every channel on Sirius is commercial free unlike XM, I bought Sirius because I tired of the clear-channelization of America.

www.siriius-backstage.com has info on Sirius installs too.