David.. you are heading down the right track..

Someone above mentioned buying good quality fly lines and i think that is good advice.

Also something for you to think about is that sencitivity isn't so much of an issue with fly rods as you are not expecting the rod to transmit a light bite so that you can set the hook. It's more like fishing a spoon all of a sudden you'll have a strike and either the fish will be there or he won't. it won't be like drift fishing that requires a sencetive rod to feel the softest bite.
If you want high end quality without breaking the bank you can often find used rods for sale online at various fly fishing websites. Sometimes even here in the classifides section.
Tight lines and never be afraid to ask questions