You should still get a Riva if the price works for you. I have an ego and love it. My vapor king was a little light, and have not touched it since I got my ego about 3 weeks ago. Order a higher vg, and for you, maybe go 12 mg nic, or 18 tops. Some juices are harsher than others. I love my Vapor Bomb peach. almost no throat hit, and its 20%vg. My tasty vapor waffle has quite a bit of throat hit (harshness) but the flavor is good, mellow and not sweet. Menthol probably will give you throat hit, and if you dont want that, you may want to stay away from the menthol, or anything cinnamon.
The ego has allowed me to not need an analog. I dont think the VK would have done it for me.