If you are not using the fx loops you can run one of those to a DI box and plug into FOH and still use some effects on the real acoustic or fake acoustic sound. You can maybe get an okay-ish sounding fake acoustic sound out of an electric. The way I've done it is using the IR into a mic pre, which I don't think is on the HX FX, you might be able to use something else to boost the signal a bit, into some reverb, a cali graphic EQ into a LA studio compressor. I do some hi and low cuts on the IR and do some more EQing with cali.
If you decide to go down the FRFR path, but you also like Amp in the room, look into power cab, it kinda does both, so you could have it playing an amp cabinet sound then switch it to FRFR mode for acoustic sounds.