Flexibility
If 1200 has to cover the wheels and the components; I'd strongly suggest the Cruzbike wheels; they are a complete steel at the price. That will leave you with over 800 to work with for the rest. If by components you mean just the GroupSet then I would get the SRAM product line so that you can mix and match parts from RED, Force, Rival, Apex and S-series. That way you can pick your spots. If on the other hand you mean components to be all things; groupset, computer, bottles, bages, tires, tubes, and fancy bits; then I'd seriously go look at the Groupsets from Microshift. Their groupsets are likely to cost $300 or less and leave you money for the rest of your build