Welcome Vaping_Irishguy
I don't fiddle much with RDAs, but the ones I have, I pretty much stick with single-coil builds (my fat fingers have a hard time doing duallies in a 3-post RDA - need ta find a 4-post to make it a little easier for me)
Have you built before? If so, start with something similar. When you get a few more posts in, you can venture to the Rebuildables section. Lots of cool coil configurations I've seen over there. My extent of "wild 'n' crazy" was to do a 4-strand 30g twisted wire in a single coil. Landed about 0.5Ω, and I'm running that in one of my Atomics right now.
PSA: If you haven't built before, take a gander at blogs by the user Baditude. He's a great resource for batteries and safety (i.e. Ohm's and Watts Laws.)
It really depends on what kind of vape you want. Are you looking for flavor or clouds (or both?)
Anyway, welcome and good luck!