I have a SON model 28 front wheel 36 hole on a Rigida Sputnik finishing today and completed a 650b front dynohub last week fro my shop display cycle, and I have just taken delivery of some Shimano Nexave Di2 rear 8 speed cassette hubs.
Really neat unit also setup with if required rollerbrake ability
With the technology rocketing forward in led dynamo lighting a B&M Lyt at 25 lux will give a brilliant beam of light and the cyo a t 40 + lux almost double, and with technology moving the way it is lower drag in the generating hub high quality lighting without any desernable drag is not far away.
The SON is a remarkable hub known for little service and down time 5000 kilometers between services the SON 28 offering superb value for money 5000 kilometers between services.
I can offer a front wheel 700c or 26 inch with SON 28 hub in silver £188.00
Shedborn Bikes 
what headlight would you reccommend with that hub and how much would the lot cost, thanks
anthony.
what headlight would you recommend with that hub and how much would the lot cost, thanks
anthony.
Regarding the light issue , you can of course go for the SON edulux which is very pricey which uses the guts of the B&M Lumotec IQ C or you can of course for the Lumotec.
The front wheel based around SON model 25 is £188
the front light Lumotec Cyo N + for hub dynamo and standlight is around £90.00
if I do as a package the price can be adapted