I think zander is right about a 3.5tc rod as no matter how loose you set your cluth it will still bump fish off. Take pole fishing for instance, if you use a heavy elastic for catching small fish you will bump the fish off no matter how softly you strike. Yet if you fish with a light elastic you will bank alot more fish. I know because i have done it myself.
Also if you drive a 4x4 600 miles and then drive a micra 600 miles you will use alot less petrol in the micra