I reviewed X19HD a while ago, but it has been collecting dust even since. Original bought it as C30 replacement but the SQ is disappointing. I don't know how Teclast can market it as C30 killer. For now, I still sticking to my Fuze + LOD + amp as my main and sometime RoCoo-P or iPod Nano 4G + amp. Like you, I am looking for a DAP as well, but I am more interested in something smaller as C30 replacement (the battery is dying). Unfortunately the Chinese has swifted all their attention to Android tablet so I don't think we will see any good player anytime soon. Even Teclast has somewhat abandoned their T59 project, though they don't want to admit it.
Beside those you have mentioned, there are also DP_I from Little Dot. Also they released the DP_II recently, which is slimmed down DP_I with only COAX and TosLink SPDIF out, intended as a pure digital source. It can be paired to their DAC_M (which is a portable amp/DAC) or something like FiiO E17. Of course there is also the new HM901 coming from HifiMan, which will be quite expensive but looking very promising.