I doubt that would have been practical. The 040 was expensive, power hungry and hot and were only used by Commodore in their big-box systems.
What the system really needed was Fast RAM, even if it was only an additional 1MB. That and something better than akiko for chunky graphics support. If not a real chunky display, then at least an implementation of akiko that could both perform the C2P and write the result to Chip RAM directly, rather than being something you wrote to, read the results back from and then wrote them to Chip RAM yourself. All that data shuffling didn't do performance any favours.
And above all, proper developer support and a disk drive standard built-in so that shovelware would be discouraged (and being neat for savegames and backwards compatibility).
Anyway, my vote goes to the A500. Still ahead of it's time (though not that much as the A1000) AND affordable for many.
