Nate, I'll throw my support with what others have written, and I'll add that I conducted a rather exhaustive search for about 6 months before buying my 16G. I read magazine reviews, checked chat rooms, and got my hands on various machines at my local stores. In short, I found that most machines at this price point are actually quite good (nothing seemed horrible), but I felt a world of difference when working with the 16G. I'd go as far as saying that the 16G's competitors almost seemed like toys (well designed and certainly usable, but still toys) when compared to the 16G, which is so beautifully laid out and thought out... and apparantly built like a tank, with its aluminum casing. In the end, my decision only came down to where to buy it.
The only big drawback, for me--primarily a guitarist, but also a keyboardist and horn player--was where to buy it. One lesser drawback is the rather sketchy owner's manual: most stuff is there, but I really need to search for it sometimes. The emergence of the new aw16g.com site (thanks to our Dinsdale) and my new friend Ed Blackmore (Yamaha techie), though, give me confidence that I'll always have help when needed.
Enough blathering, but I do understand your need to make a wise decision. I myself was in your shoes just a month ago.
If you can actually get your hands on these machines, I think you'll find your decision much easier, Nate.
Good luck,
J.