I like the sprung b67 on my Surly qutie a bit. I'd imagine most people would like the sprung model brooks better, but they definitely do make a bit of noise if you don't keep a little oil on the front adjustment nut ;0. Mine does anyway.
If you're comfortable on the b17, I can't see how you wouldn't be just as comfortable or more on the flyer. Just like the b68 vs. the b67. Same top, just sprung or unsprung.