Having a really sharp knife available in the kitchen cuts down on your prep time and therefore makes your cooking experience much more pleasant.
But great kitchen knives cost a bundle, right?
According to this video by Kohaku the cat's personal chef Jun Yoshizuki of Jun's Kitchen (previously at Neatorama) you don't have to spend that much on a quality kitchen knife- you just have to sharpen it right:
So I got a lot of requests to make a video about knives and, like, asked me for my recommendations and stuff. But what I can recommend you is going to depend on your budget, what shapes you want your knives to be, which steel you want your knives to be made of, brand, design, there’s just so many things that you need to think about before getting one. But one thing I can say for sure is that, no matter how much you’re going to spend on your knives, they eventually get dull, and you need to sharpen them.
-Via Laughing Squid