Personally, I don't care for RDAs. I have an igo W that I use to test different juices, but I could not imagine using it all day, just filling it up with juice. Since you already have begun to master your skills with your Scar, I would say maybe try to build the scar with microcoils.
I'm more of a tank RBA guy. I have all of the GG clones (Ithaka, Odysseus, iAtty) and a Kayfun Lite. All of these attys are incredible in terms of flavor and vapor production. They are pretty much as close as you can get to dripping with a tank. I think you would be pleasantly surprised at the vape of these tanks, especially compared to an RDA.
If the price tag scares you (all of these tanks are over $50), you could try your hand at building an SS mesh wick in a genesis style atomizer. The SS Mesh probably is the best wick for flavor and is even better than dripping. The difficulty is that with SS Mesh, it is hard to build a coil and get it working with no hot spots/shorts. The upside is that it is worth it. You have not tried a juice until you have run it through a mesh wick.