TerraSin
Being the first major contender on Steam was also a big plus. I would love to know how many new Sonar/MC users there are from selling on there. Suddenly a lot more people know what Sonar is. :)
I got in through steam. I'd had my eye on Sonar. First DAW I bought since finishing up in college 8 years ago. I like the look of it, because it appears more approachable than other DAWs. Although in saying that, I used Cubase in college, and it's not complicated in appearence, wasn't very inviting though at the same time.
Haven't had too much use of it yet, though. Going to be building a pc over the next couple of days to sort that out.