I picked up the Werner Sidekick in a 191 for my creeking paddle. I paddle a CFS and I'm 5'10" 200 lbs and would never go longer.
It's very personal, but I feel like 197 is HUGE and 194 is even long. It took a touch of getting used to, but it does make everything better to go shorter.
I picked up the Sidekick on the recommendation of Chris Joose. I was in your situation, too...couldn't decide on blade shape for creeking. He said the Sidekick, though designed for play, was the ultimate creek blade.
It allows me to get purchase without taking my blade all the way vertical, which makes it quicker to get from one paddle stroke into the other. Plus, it makes turns quicker.
Lotsa folks are using this exact paddle for their creeking, and I recommend it highly! I have a friend with the powerhouse, and yeah, it's smooth, but I can tell the difference and I definitely have to get my paddle more vertical to get the same power!