The free pro-tools has severe limitations.
And then you're stuck learning the pro-tools interface, but you feel like you should because it's the industry standard, right?
But then you want to record more than a few tracks simultaneously at home, so you have to buy their hardware (digi001 or digi002 I think) to get that upgraded functionality, and this is where they stick it to you. Terribly over priced for what you get.
Get a decent Yamaha mixer, a low level Lynx card, and Sonar or Cubase. If you don't want to shell out for Lynx, then maybe m-audio's 6 or 1010 cards will do. But then you're sacrificing analog to digital conversion quality, which is where you'll notice a quality difference.
Anyways, the point is that you won't be able to choose the analog to digital conversion quality you want, because you're stuck with the protools hardware.