Streaming music comparisons and quality

Currently streaming music from HP desktop and Apple Time Capsule HD/router in a remote room of the house to a Zardoz server (hot rodded Apple Express from France) wired to my system in downstairs listening room. Use Apple Touch as my remote to select cd tracks from my music library on the Time Capsule. Being an older guy, I'm not up on computer technology. I'm assuming these services must be purchased or subscribed to. Are they something that I could stream to my system using my current hardware (have HP desktop in a remote room of the house)? I like all music genres, but lean toward the rock I grew up with in the 60s & 70s. To that point, I enjoy my Sirius rock channels while driving in my car.

Rockyboy...yes they are subscription services that allows one to pull up specific albums and listen to them completely without interruption. The $5 per month does have ads so I recommend splurging for the $10 per month service. It's basically like having access to a giant music database so it's a great way of checking out albums and artists before making purchases or listening to stuff that doesn't justify a purchase.

Rockyboy - I assume from your system description that you're using iTunes to control the music library and stream it to your downstairs listening room.

With Mog and Pandora you would be using a browser or their desktop applications for access to their online music libraries. To stream those wirelessly to an Airport Express you'll need a application like Airfoil to handle the streaming. It works in conjunction with the Mog or Pandora applications and lets you direct the sound to as many Airplay devices as you have. Airfoil is a very nicely done, versatile product.