We use our computers six or seven hours a day. And yet we interact with them on $5 commodity keyboards. I think it's worth the time (in research) and the money to get yourself a good keyboard. But the search for "the right keyboard" has side-effects, the most noticeable being the good keyboards that were bought and discarded during the search for the right keyboard.
I currently own two Kinesis Advantage keyboards, one for home and one for work. These are my primary keyboards. The one at home has been altered to use Cherry Blue keyswitches (they arrive with Cherry Browns). My second choice keyboards if I can't lay hands on a Kinesis Advantage are the CoolerMaster QuickFire (which has the Cherry Blue keyswitches) and the IBM Model M (with the notoriously loud and truly awesome buckling spring keyswitches).
- Kinesis Blue - replacing the keyswitches in a Kinesis Advantage with Cherry Blues