I have a hongfu discount voucher if any body would like it (8%).
Gemm had recomended hongfu to me previously.
Jenny the contact is very nice and quick to comunicate.
I did some trig calculations on wheels when I was looking at going carbon before I got my campy pista's and came to the conclusion that anything 50mm or over I was better off with low flange hubs. Alex cycle in japan are good fast and cheap I have bought from them before + are about 20-25$ cheaper + lighter than the HF.
From memory 88mm and HF gives you over 8.5 degrees of spoke angle.
The other question is do you go single fixed, most wheels are asymetricaly drilled for road use so the nipple to drill/hole angles will match better. Or do you go fixed/fixed so the wheel is symetrical and easier to build?
Another thing to think about is the sidewall strength on the 88's which can vary depending on batch/manufacturer ect ect. For that reason I would not pick something on the extreme end but would pick from the middle of the range.
Most of the Chinese 50mm carbons are knockoffs of the older zip 404's and
test almost as good in the wind tunnel.
I'd go with those, plus there is lots of positive online feedback about the 50's.
Anyway idle thoughts, I am sure others have different and there own opinions. Short of being shown new data or information that's what I would go for.