[citation][nom]airborne11b[/nom]Logitech G-series keyboards are the only ones worth buying imo( gaming wise of course). I have the G19 myself, and used to own the G15, I find myself using the macro keys contently, and the color LCD displaying ventrillo info, or news feeds is great. Only downfall for some would be no "ergonomic" G-boards, but those suck for gaming anywho. I understand that not everyone uses PC to game but I've always typed on standard keyboards, never had any pain (probably from practicing good form and posture, and not having a cheap desk) so I've never seen the point of an ergonomic keyboard.[/citation]
I use a Microsoft Natural Ergo Keyboard 4000, which has more programmable buttons than the Logitech G19 (though the 15 I think has more), and they're in easier to reach locations (for MMOs at least) right above the number keys. You can also re-assign the back/forward buttons underneath the spacebar to whatever you need.
I've found it way more comfortable to use, with less strain on my wrists and I'm not missing a thing that the logitech G series offered, except an LCD screen that really didn't serve much of a purpose for me.
To each their own.