You can expect better performance from a fiberglass, carbon fiber or even a hybrid of carbon fiber and fiberglass blade.
A better fin blade will work more efficiently, transfer energy better and will allow you to dive somewhat longer and deeper.
I think some people become a little "overly-enthusiastic" about the degree of improvement most divers will experience when upgrading fins.
One of the most important considerations is the footpocket comfort. If the pocket is not comfortable, you won't be having fun.
The nest most important aspect is the blade stiffness and this is also related to the pocket itself - because the blade and pocket work together as a unit.
At 160 lbs, we would recommend a soft blade. Generally we recommend soft to anyone under 200 lbs, but personal preference, conditioning and also the type of diving affects the decision.
I'm pretty confident you would be happier with a quality soft blade. We offer a variety of blades and fins.
To be perfectly honest, you will probably be happier with a good quality fiberglass fin (MAKO offers one at about $200) rather than the best, most expensive, STIFF, high end carbon fiber blade made (not sure exactly who sells the most expensive blades), but hopefully you get the point. If you are trying to improve performance - make sure you select the proper stiffness.