The Spitfire is definitely a nice looking screen, I had one on a Rebel 250. But for the Zuma I just went ahead and got the Yamaha screen. It's ugly, being basically rectangular, but it seems to do a pretty good job. I noticed my GPS speed actually increased a couple mph with it on. I would have expected the opposite.
"I refuse to give up the thrill of living for the relative safety of existing" Nick Ienatsch
"Life is not a race. Don't treat it as such. If you don't believe me, just have a look at the finish line"