Anyone out there riding Velocity Spartacus wheels or Mavic Cosmic elites? Like em? Don't like 'em? Looking for a strong aero-ish wheelset for cruising the flats and rollers in a windy locale, amd LBS is pointing me to these two. Spartacus are very low cost, but are the hubs ("Formula" with sealed cartridges I believe) up to snuff? Cosmic elites offer the hubs but i believe build quality has been an issue (?). I'd welcome views from riders of either...