Yo M & B:]
I can't tell you much about the Korg since I've never used one. However, I do use the Yam 2816.
The 2816 has an "ugly" manual; but, if you have some recording experience and read and re-read the manual and push the buttons, you will soon learn to get around the 2816.
Burning CD's on the 2816 is about the easiest part to understand via the manual.
You will need to buy a USP power supply unit if you go for the Yam. If you are recording and the power goes out, the manual states you could damage the HD and you will lose data. Yamaha does not tell you this in their glitzy advertising but it is in the manual. Also, Yamaha puts the "required shut-down procedudre" on page 12 of the manual -- dumb move.
The reserve power unit I have will give me eleven minutes of power if regular power goes out. It only takes 15 seconds to shut down the unit.
I didn't turn on my unit for about a month when I bought it as I wanted to be sure I didn't screw up anything; so, I sat and read the manual and recorded with my MD8.
Between the MD8 and the 2816, there is NO comparison. The Yam unit produces "excellent" sound. If your Korg does that, go for it. It's all in the wallet and the ears.
Green Hornet