Of you like the sound and feel of DAS keyboard, you'll love the northgate. IF you see one cheap on ebay, grab it... they routinely go for over $300.
The DAS keyboard has a very similar feel to the northgate --- very crisp feedback. I love the "m," but the keys feel just a touch to mushy for me vs. the northgate and DAS.
I like the DAS because , well, it's newer, and has a convenient usb III hub, the completely blacked out keys are awesome, and it is well made. Believe it or not, the northgate is heavier, and has even less give than the DAS. Also, for the truly nerdy, the northgate has a more robust sound ... the DAS sounds awesome, but a little too high pitched. like women's fingernails clicking on a desk. The northgate just sounds a little meaner.
Any, you can tell I have a keyboard thing, so feel free to poke fun. The red glowy thing on the upper right hand side is a volume control... the buttons to the left of it are media controls, but since I never use them, I have no idea which is which.
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huh.. just read through the posts in this.. a little shocked I got no "blasphemy" responses for ditching a northgate omnikey ultra for a DAS keyboard...