I know you mentioned you wanted a fixed blade, but I wanted to chime in with what I think is the most useful knife money can buy right now:
https://www.amazon.com/Kershaw-Onion-Serrated-Folding-Knife/dp/B0009VC9YA/ref=sr_1_6?ie=UTF8&s=home-garden&qid=1284385416&sr=8-6
It's an awesome knife: I really like the rounded serrated edge on the blade because I think the rounded serration lasts much longer than the rigid pointed ones. It also comes extremely SHARP out of the box: no problems at all shaving my arm hair with a new one. Also, the "Speed-Safe assisted one-hand opening system" is pretty awesome: this thing opens faster than any switchblade does with a satisfying "click" (somehow switchblades are still illegal in Minnesota, but this design is ok, even though it is far superior to the traditional switch-blade). It also has a great safety lock that can also be easily used with one hand, but prevents the knife from ever accidentally opening in your pocket. It also locks in the open position quite securely: there is not much of a chance of this knife folding up on your knuckles when you are in the middle of cutting something that needs a little bit more elbow grease than normal.
And while the coolness factor of this knife makes it hard to ignore, I think what I love the most about it is the large clip... This is the only knife I have ever owned that I can carry around day to day and never actually feel it in my pocket because it clips securely to my pants pockets, and the knife itself is pretty thin (I hate things bouncing around in my pockets: drives me nuts). I know it doesn't sound like a big deal, but that is the biggest selling point for me: I have been buying these for everyone I know for their birthdays and every single one of them admitted they never knew they needed it until they had one of their own... It's so handy to have the knife always sitting in the same position in your pocket, easily accessed, and easily opened with one hand.
If you get the version without the serrated segment, you can even gut a deer with it fairly easily...
For the price, it can't be beat for a knife you want to carry around day-to-day.