There are some good recommendations on here, and some really poor ones. Start with a good steel: S35v, O1, D2, S90... I have heard elmax can be good but have not made or used knives with this material... so no opinion.
Then look for good blade geometry: A blade that finishes out all the way or near the backbone will cut and sharpen nicer, all else being equal. Not too thick, not too deep of a belly (hard to sharpen). 3.25"-4" is ideal IMO.
Cheap stainless won't hold a candle to supersteels, tool steels IMO.
Then look at handle geometry: What fits you well, has enough grip to be safe, and cleans easily. Cool looking doesn't cut it (pun intended). There are some very nice looking knives out there that are well made, hold an edge well, and cut well.
Man, some of these folks are missing the mark and have not used good knives, or they wouldn't be making some of these recommendations.
If price is no object, look at some customs or reputable semi-customs.