Pretty slim pickings on DAPs. And no cell phones, iPhones, iPods, or gPhones.
As far as updates, it lists the Pacemaker as forthcoming. In fact its out, costs $750, and I don't see a digital out. Only hope is where it says "USB 2.0 connector, for data transfer".
I wonder if a little netbook might not be a more economical solution that could be added to the list, I mean you can get a Dell Inspiron 9 running Windows for $250, can't that push .flac out the USB into the OP's iBasso, and probably its as portable as some of the CD-players and 8-track-tape-players listed.
Speaking of which, according to wankerpedia "The iriver H100 series (originally iHP-100 series) is a series of discontinued portable digital audio players (DAP) made by iriver company and originally released in October 2003. The H100 players differ only in hard drive storage capacity, RAM size, color, and thickness. It was succeeded by the iriver H300 series." Which AFAIK doesn't have .flac or digital output. So there's another update.