My venerable old Tom Sholtz Rockman is (a) beginning to show its age and (b) the bombastic 70s stadium rock sound is getting on my nerves. So, with all the modellers available now, what's a good headphone amp for quiet practice? Not looking for a practice amp w/ headphone jack, just a little walkman-size can-amp that's good and reliable. Bonus would be if it were good enough to hook up to the computer for rough recording, but that's a secondary concern. Hows the pocket POD? I've heard mixed reviews. What else is there?