Which Groupset?

So Shimano cheaper... and requires no tools... You can build a cheap Di2 bike by your own... Shimano --> poor cyclist

Campagnolo... too expensive... you need really specific tools... you can't afford to have it build up in a shop... Campagnolo --> rich cyclist!

... What about sram?

According to my LBS "some people who just refuse to have Shimano, some people just won't" ...which I think is quite telling.

I thought it was quite interesting this shop's putting DA9000 on all their race bikes (6800 on the CX bikes).