I have narrowed my new headphone purchase down to 2 choices. A used set of SR-80s or new SR-60s. The new 60s cost slightly less. I've read that the SR-80s have similar detail but better bass than the 60s. I have also read that the 80s don't sound the greatest unless driven by a headphone amp, which I really don't have any plans to buy. So basically I am worried that the 80s won't sound good when used with my computer/reciever/portable CD or that the 60s will be bass shy. Which would you pick?