Best: releasing a cut-down, low-cost home/hobbyist Amiga (A500) which got the platform widely adopted on the strength of its market for games.
Worst: releasing a cut-down, low-cost home/hobbyist Amiga games machine (A500) which decimated the Amiga's reputation as a professional hardware platform.
Oh, and spending all that moolah on setting up a PC division when they could have been finishing AA/AAA was sheer madness...