Re: TFO Pro Series. Maybe a little late to ask...
If that's your only rod the 5 wt. is going to be a better all around than the 4 wt. Here's something to ask the guys at the shop. The guys lined my reel to be used on my TFO with a Rio Grand. It's 1/2 wt overlined automatically for the fast action of the TFO professional. Congrats on your rod.