Thanks Kuidaore that give me a good rough idea and starting point. I'm going to be using pre-made coils that are 2.5 ohm, on a VV device. The main reason I'm getting one is to test flavors and I figured this would be much better than standard 510 attys. Also cheaper in the long run with 5pks of coils at $2.32 and even cheaper yet if I decide to make my own someday. Also I like a wide variety of juice flavors and sometimes I just like to drip because you can switch flavors easier and more often. Oh and I've heard the flavor and vapor production with these is really outstanding and I've been hearing that for awhile now so I just have to check it out.
Oh one last thing - I think P Busardo has some videos now with RDAs I bet I should watch those for some good pointers.
Phil has fantastic videos on rebuildables--from ViVi Novas and up!
Check the YouTube!