Expensive knives up to about 100$ make a world of difference, everything above that you are basically just paying extra for good marketing.
Every place i worked at always only had 1 type of Victorinox knife; the bread knife. They are cheap and do the job and when they are dull you just throw them away.
On the topic of sharpening knives, i worked at a restaurant where we had one of these belt grinder things in the back.
Whenever the Chef got annoyed with the dullness of the knives he would angrily walk to the grinder and spend the remainder of the day sharpening everyones knives to perfection.