I'd love to be able to get a wind tunnel fitting, but none are nearby, and I've already spent quite a bit on tricking out the bike this season (having bought the 808 and a Q-Ring chainring on eBay recently, plus a pro fitting at the UC Davis Sports Medicine Institute down in Sacramento). Maybe next season...
The 808 is a great wheel. From my bud's experience-a really good fitter will get you very close to maximum wattage so I'm betting the interval work will get you where you want to be.