Now that I am hooked and commited to fly rodding I am looking to get a couple of new set ups. I currently have a cheapo 6wt for bass and pond fishing and a spin/fly 5wt rod for trout. I am looking at getting 2 new set ups, either a 4wt and a newer 6wt, or a 5wt and a 6wt. I have been told if I get a rod to go 2 weights higher with the next one. I like the 5wt for trout and worry about casting a 4wt in wind. I definately like the 6wt for bass so my quandry is either selecting a 4wt or 5wt. Any suggestions?