I really like my Werner Little Dipper because it is so light and easy on my body. I did have to shorten mine but it does come from the factory in 215cm which seems about right. I think I shortened mine down to 213 cm. I noticed the NRS having a sale so they are a really good buy right now. The premium for a full carbon is about $75 for about two ounces. I got mine used, but if I was buying one new I'm not certain I'd notice the difference in the two ounces. Even on a 20 plus mile day I think paddle length and shape make a lot more difference than weight.
As far as paddle shape goes, nothing is more comfortable in warm weather than my Lumpy Paddle. I really wish I could get a two piece model. It's getting a few big lumps on it so maybe some day I'll modify it. In the mean time it is winter so I'm paddling with a single blade most of the time to keep my hands warm and dry.