Best Way to Install Sirius Radio in a 2000 Accord?

I just bought a 2000 Honda Accord from my friend and it has the stock radio / CD only. I used to have a BMW and I paid extra money to have Sirius wired in through the "AUX" input instead of using the FM Modulator. Should - or can - I do this "AUX" setup in my Accord? What is the best setup, and how much would it cost? I am not that particular, I just want it to be reliable and sound o.k. I have heard mixed things about FM Modulators. Also, I wonder where the best place is to have the sat. antenna mounted. Thanks in advance.