If ARM is the CPU to go around, then use it? The original Amiga idea was to use the best available technology for a given (low) price. That in turn makes it possible to grab a huge market section, which is why there is still Amiga fans around. The other is just that "the best" choice you can make for hardware within a given budget. Which will attract persons that appreciate sound technology choices.
Next objective, which graphics chip will give the best bang for the buck?
And will this translate into the best low price multimedia platform, which seems to been the nische for Amiga ..?