Shops offer wheel builds only around Shimano hubs 99% of the time so your kind of stuck with factory wheels if you want to use Campag groups.
Personally I like the Ergo shifters over STI's - nicer design (thumb paddle), and hell of a lot cheaper to repair or replace. I rode a bike with 105 10speed STI units and hated it, not the shifting, just the bulky hoods and dicky gear changing all rolled into the brake lever is not appealing. Campags more finesse looks are a selling point too, all to his own I suppose on that one. If you like the industrial kitchenware look then go Shimano.