It sounds like A-eon are only committed to producing p5020 motherboards at this stage. Don't hold your breath for a choice of 3.
If only somebody was prepared to invest $1.2m in AROS development we could have a great range of cheap hardware from circa $50 boxes to plug into a TV, a range of tablets, netbooks, notebooks and up to high end desktops all running a free but very capable OS.