At the moment, we have three DX9 (which we prefer over DX8 because of the master override feature), two of which work with DSM2 and one doesn't - and we will get problems if we have to buy any more (as the DSM2 capable ones are no longer sold in the EU).
And for now, RX is all I need, so the spektrum port would be fine (alternatively, maybe one of the SWD pins supports UART, then I could use that).
To update the Deltang, according to the datasheet I'd expect that I'd need access to pins P1.0 and P1.1 (21 & 22) of the CYRF69103, but if that is not possible I'll have to live with it.
EDIT: Initially, I didn't think being one of the uni guys was important for my Deltang question...