The Ruana you mentioned makes a good solid knife the equal of about anything out there. I don't like the bone/aluminum handles, but the blades are top notch.
There are many great knife makers these days. It all depends on what you want in a knife and what are you going to use it for.
Myself, I stay away from the big names mostly because there is a point where your paying for the hot knife or trademark name.
A good knife should cost no more than $250. That is excepting bowies and large pieces like swords that take a lot of time and material and are difficult to produce.
Ruanas are in this ballpark and other makers are out there as well.
A fella who makes a good solid knife at an resonaable price is Mike Mann of Idaho Knife Works. Good knives that are well known for under $250. He is one of quite an number of great makers out there.
You don't need to spend an fortune to get a good blade.