I have Parlee Z5 (not the SLi, that's my wife's bike), but that has now become my second bike… I bought a Neil Pryde Bura SL, only because I got a fantastic deal on it, it really light and it's electronic only (and I wanted to try Campy EPS, die hard Campy fan… what can I say?!). Long story short, the Bura SL is in most regards a better bike for me than the Z5. Super stable, yet responds to every single input, accelerates like crazy (used to be a sprinter when I raced, so I still pack a bit of a punch when I want to) and I've never had a bike descend better. The Z5 is a little more comfortable for really long rides (I'll pick the Bura for 3-4 hour rides, but longer rides than that, I'd pick the Z5, which has the "magic carpet ride" float feeling, unless it's hilly, then the Bura will come out to play!).
Overall, I'm so impressed with the Bura SL that I'm looking at a Nazare (aka Alize) to add to my stable.
Oh, forgot to add… without adding any WW parts (3T Ergonova Team bars, a ARX team stem, a pig of a seat post, although I guess the EE brakes are WW approved…), my Bura is just over 13lbs and that's with a Quarq power meter. My wife's Parlee Z5 SLi is lighter (although that's an XS/Tall, built with Super Record EPS, 3T Ergonova Ltd, MCFK seat post, Gravitas brakes, etc. etc. etc.) at just under 12lbs.
"Suddenly the thought struck me; my floor is someone elses ceiling" - Nils Ferlin