looks like a plan is coming together!
NB the ceramic-coated version of the Open Pro is 2x more than the plain version. Retail they are about £45 and £90 respectively. Whether it lasts more than twice as long I don't know but Dan Bo reckons they do.
Also when buying cartidge hubs make sure you can get replacement bearings for it - even buy a spare set with the wheels. Thereoretically you can get them from an industrial supply place but there are thousands of different size bearings and you have to have the right one.