I agree with Darin - good advice.
Don't be too concerned with a specific maker.
Ultimately, your budget will determine the quality of the piece you buy.
I'd suggest looking for one with a motto and maker mark, and a diamond with no enamel damage. The better the condition of the blade, the higher the price will be. There are some great 'used' condition knives around that are very collectable as well.
Don't be in too much of a rush to buy one, there are always plenty available, and you should have a good look around and get a feel for what the prices are, and what you can get for the money.
Good luck!
Regards
Russ