Welcome to the "Battle Blades" forum.
Apparently you've posted similar question on other forums in your quest. And equally apparent is the fact you haven't yet gotten a reasonable answer.
Perhaps this will help you
If you're looking for a good, reasonably priced folder you should look to the Spyderco line of folding knives. They offer both conventional straight edge and serrated blades, and a broad range of blade lengths and shapes. The Endura model is very popular and a great utility folder, as well as suitable for self defense. Spyderco Knives are well designed, well made, and found nearly everywhere.
Fixed blade wise it really depends on your needs. KA-BAR makes a series of great fixed blades for a reasonable price, and Cold Steel offers the SRK which is likewise a dandy all-around camp or combat knife for next to nothing.
You can spend hundreds of dollars on a custom folder or fixed blade, even thousands, and still not be much better served than if you'd purchased one of the above mentioned knives.
Finally, this particular forum is for folks like yourself looking for help. You're more than welcome to visit and post, and more than welcome to ask any questions you might have about either training or products. No one has all the answers, or necessarily the right answers, and there's still lots of questions out there coming from all of us.
Heck, I edited a knife magazine for 7 years and wrote 2 books on the subject and STILL look to others for insight, input, and good recommendations
Sierra