Fangshi v2 is a very quiet cube - it's what I'm using now.
Pros: fast, extrememly quiet, agile, and very very smooth
Cons: inaccurate turning = corner twists and many lockups, weight and feel seems a bit cheap, can only cut 40 degrees consistantly
I only have the FS and a few Dayan brands so I really can't help you with anything else.
Although the FS and especially the Huanying are known to be lube eaters, so dont lubes the pieces - just the core. Moyu/YJ wise most people recommend the Weilong or Su/Chi long - why not think about those?
If you need a cube fast I reccomend
http://thecubicle.us/. Some prices are a bit more expensive, but free shipping/good customer service/current sales compensate the price.
Oh,
http://speedcubeshop.com/ has free shipping today and 20% all products...haven't tried them though.