Radios

I am considering not buying another iPod for working out in a gym, but rather an XM or Sirius portable radio. I am in a metropolitan area and will mainly use it within the confines of a gym. Which portable radio will work best for me? Basically, I want a clear signal in doors with as many comedy stations and sport stations as possible. Which type and brand of radio would best suit my needs?

check out sirius.com,they have a unit called the stiletto that works indoors and out,it switches to wifi when indoors.also most metro areas have terrestrial towers so you can get better signal.i have sirius,they have several comedy channels and 2 howard stern channels that run shows 24/7.for sports sirius has NFL,NBA,NCAA,NASCAR..but if u want MLB or NHL you have to go with XM.