Sorry mate, someone beat you to it!!
I would definitely go for the CRP-5 if you're going to go commercial. It's bigger than the -1 so the wind side is easier to read off. They look identical to the untrained eye. I wish I had!
And shop around on the web for it. Of all the places I looked, Pooleys were most expensive!!! There was a place in Huddersfield on the web who I got it from, £15 cheaper than Pooleys!!
SK