Here is a photo of my keyboard. The coloured keys are sold as WASD/escape keys but I used them for playing Skyrim - the green one on the right is especially handy for gaming as i don't have my fingers on the home row when playing games rather than typing. The blurred circuit board is a development version of the Midifighter 3D as the photo was taken before they were announced.
I've been really satisfied with it, and would definitely recommend it to anybody looking for a nice mechanical keyboard.
Well, mine is quieter than other keyboards I've used, eg a Dell keyboard as long as you don't bottom the keys out, though I do get the occasional loudish click when the keys snap back, usually from the space bar, though if I slow down when typing I can make it almost completely silent (obviously thats not normal typing though).
 I did have a Saitek eclipse a few years ago that was quieter.
Mostly keep my vim key-binding mappings small, so I'm not confused when working with it with default settings. Mostly use <Ctrl>-c to get out of insert mode though, escape is so far.
The only thing I wish is that the keys were in a flat grid rather than staggered, but it seems very very hard to find any keyboard like that, so no biggy. I've considered getting a Kinesis for years now too, but since I got the DAS, I've had no plans of switching any time soon.
I haven't completely worked out my vim bindings since I've been doing a lot of Qt development in QtCreator lately and just used that without vi mode. I use Colemak for my layout so some of the default keys are a little less than optimal, but I also don't want to change them too much. With one or two simple key swaps it seems quite usable though.
On windows (where I don't use vim) I did map alt-gr to some common programmer symbols; mapped caps lock to control and control to backspace. On my laptop I use vanilla colemak though (including caps lock as backspace, though I'm likely going to change that some time).