I'm surprised you would say it's too wide. With one hand on the keyboard and the other on a mouse, it puts your hands about shoulder width apart. That's feels perfect for me and makes it ideal for both typing and mouse work. You get the advantages of a small number pad-less keyboard (i.e. don't have to move your hand very far to get to the mouse) without the disadvantage of having to bend your wrists when typing with both hands.
I personally don't care what may or may not have went on between Kinesis and Maltron but I prefer the Kinesis keyboard. One thing the Maltron has that I really wish the Kinesis had was real, mechanical function keys. The chicklet keys are pretty lame.
Aren't DataHand's like 4x the price of a Kinesis? I've never used one. Aren't the two halves of a uTron flat? The concave bowls of a Kinesis are one of the biggest reasons why one uses it.