For most of us, Pro Tools offers nothing greater than the other software. But for a studio, Protools' scalability, wealth of plug ins, and standardization makes it a far better choice. Digidesign was very smart to market versions of stripped down Protools for home users, it was a huge market for them. But, it doesn't offer the home user any real benefit for recording until you start playing in the same park where the bigger recording professionals do.
Two things that home recording can greatly improve from is a good mic and good headphones. It also helps to play well, but that might be asking a little much. Well from me at least.
Last note, Mark Sandman of Morphine commonly used a Tascam 688 to record the sessions in his loft. These recordings frequently made it to the albums. If the sound is good, go with it.
Patrick