I second the borrow different lines and try and see what you like idea.

I have two bamboo rods and when I first got one I was afraid I would break it. You won't. You will be very surprised of the strength.

Using a heavier line changes the feel of the rod and the timing of the load for your cast. Hope that made sense? It's a feel thing.

I don't have a drag on my bamboo fly rods so I haven't been afraid of fish breaking the rod.