So what you're saying is I have to buy 4 sticks of Crucial?G-skill
Difference between RAM brands is mostly the heatsink, chips come from wherever is cheapest that day. On Newegg you can pay 100$ more for corsair, stare at out of stock for Oloy, or buy some Crucial and find out that they mostly make single rank with no way to know until after you get it.
Dual rank only helps if you're buying a 2 stick kit, and that's all the brands selling 16gb 3600cl16 sticks.