I finally decided to wait for a latest Cannondale SuperSix Hi-Mod or a Scott Foil frameset, which depends on availability and my LBS's efforts.
BB standard is retrieved from user manuals, and I am going to use Shimano cranks.

• Cannondale SuperSix Hi-Mod: BSA/68mm - Sleeve required
• Scott Foil: BB Housing 41 x 86.5mm

This may leads to debate over ceramic and steel bearings, but I just have to ask.
Also, it may leads to some discussion over quality manufracturers.
I guess the cheapest choices should be Shimano BBs, but how good are they?
I saw Specialized using BB-R9100 (Dura-Ace's BB) on S-Works Tarmac SL8, so may be it is a nice choice?
For more money, I can get Wishbone BBs with ceramic bearings, but it seems that no many people have experience with them.
At last, the most expensive BBs should be CeramicSpeed. Are they worth the money?
If we say Shimano's price is 1, then:

• Shimano = 1
• Wishbone = 4~5
• CeramicSpeed = 10~15

How about quality-wise?
If any better options exist, please let me know.
Thanks!