Markit wroteThe Populaire bunch hmmm, I haven't seen their work in person but I've seen their pricing and if you intend to just push a set of plans into someone's hands and walk off until they are done then they're the group for you.
This is probably correct. Completely turning a project over to a builder can be a great way to be royally screwed if: a) you don't know anything about building; and/or b) you have turned over the plans and only come back when the project is finished. Populaire do good work and have a good reputation so it is unlikely that you would go wrong with them if either a or b apply to you. However, if you're in the trade (as it seems you are), willing to be patient and get your hands dirty (i.e, be on site every day, look at invoices and triple check quality and quantity, ask questions, measure rebar sizes, check concrete grade before the pour, understand MEP and generally know your way around a build and how you can be cheated by every vendor and subcontractor - who may all try to cheat you at some point) then you should be fine with a much lower cost approach where you become the general contractor or at the very least the project manager.