Just so we're clear, and before I pull the trigger on the plus, will it work with one Satellite and one Satellite plus?
Pro Ramp Timers are compatible with all their fixtures (it is universal with using a DC plug connector) There shouldn't be any issues with hooking up a flexstrip with a satellite plus, or a orbit marine with a satellite. They will all work together.
So yes, a Satellite standard with a Satellite plus should be able to connect to one Ramp Timer and the Ramp timer will still work.
(I have to say "should" because the Ramp timers are still a prototype and bugs are being worked out. But from what I learned at Superzoo, this is what they intend them to do and they probably won't start selling them until then)