at minimum i'd use a dual regulator. If i were only going to have three kegs, i'd just use secondary regulators. If i were going to have a lot of kegs, i'd use the dual in conjunction with the manifolds. Ideal it would be nice to have a regulator for each keg, but for the cost of it i couldn't justify it at this time (have 8 kegs).
Keg connection is a pretty good store; i wouldnt hesitate to order from them again. Just double check your order when you get it. Make sure the kegs hold pressure and you have the right posts on the kegs. I had a keg that wouldnt hold pressure, but they sent me a new pressure relief vale. I also found a keg the other day that had two gas posts, but i havent contacted them yet (probably wont since i ordered a few months back). If you get manifolds specify which ones you want (the straight ones or blue ones). Also, i highly recommend the taprite regulators with the red adjustable handle.
Here is a picture of my manifold. I don't have the second one hooked up yet.