I can't get behind the RHA, adds a funky metallic/hard sound to vocals. Really wanted to like it but I can't seem to get both a comfortable fit and good sound out of it. For under $100 I would definitely recommend the Vsonic GR07 Classic for neutralish leanings, the Vsonic VSD5 for a more v-shaped tonality and I don't have a "warm and smooth" headphone sub $100 so I can't help there. My non-audio friends have stated on more than one occasion that the GR07's plus my X3ii/E12a stack was the best thing they've ever heard from a portable rig. It's most certainly not the greatest but most of my portable listening is casual and cellphone based. The serious listening happens at home.