I could be wrong (I hope not) but the FT-8x7 is not suitable for TX as you can't adjust the TX frequency while transmitting. The IC-7000 is OK in this respect, so maybe a IC-7000 / FT-817 combo? Otherwise I would suggest a IC-703 + transverter?
I am currently using a pair of FT-817NDs for my all-mode satellite station. I do not have these radios under computer control yet, so I try to comply with the "rule" of making frequency adjustments on the higher frequency. I can, and regularly do, change my transmit frequency while transmitting on these 817s. Very nice! I don't know if that is possible with computer control, but the "big" knob on the front will do that.
Once I get a better (smaller, longer battery life) laptop, I plan on getting the cables and putting both of these radios under computer control. I have followed your HRD program development, and saw it in use with a friend's satellite station a few months ago. It would be very nice. I also need to add other non-computer components to this portable setup to make my life (and those hearing me on the SSB birds) a little easier: tripod for the Yagi instead of holding it with one hand while working the mic/CW paddle/radios with the other hand, preamp to help with AO-7 and DO-64 passes that are not above 30-40 degrees elevation (I can hear the downlink OK on higher DO-64 passes), and maybe a headset/mic so I'm not holding the mic while on the birds.
73 from the desert!
Patrick WD9EWK/VA7EWK http://www.wd9ewk.net/