The $13.40 Kabuki clone from Fasttech with 1.8 ohm Triton Mini Clapton coils is great. Not an RTA out of the box, but you can get a VVWF rebuild able coil head if inclined. The rebuildable coil head is too small for me to fiddle with personally though.
The Triton Mini coils work fine in this Kabuki clone. May have to adjust the Kabuki's 510 pin with a screwdriver to get it to connect up, but that's easy enough.
If I'm going to fuss with an RTA for MTL, it's still the Kayfun v4 @ 1.3 ohms. Though the Kayfuns air flow is a bit more restrictive than I prefer it.