Let Oregon grind you a cam. 79 bucks for a flat tappet regrind 125 for a roller. DO you NEED head studs? Are they a REQUIREMENT for those heads? Those rockers are nice, but over rated for their price, IMO. A good set of the 273 rockers bushed and reworked is about half the price and will stand a .650 lift roller.
From a financial and warranty standpoint, yes, the Blueprint engines look great. From an experience and "I did it myself" standpoint, there's nothing more satisfying than doing it yourself. Either way has it's advantages and disadvantages. One way you get the complete package with warranty and all for a bit more cost. The other you save money at the expense of losing your warranty. Does the Blueprint engine come with the Trick Flow heads? They are the best right now. I would also consider THAT as well.