Re: Just remember...
@Kristian Walsh; Excellent and informative summary.
I've said myself that the Amiga was far closer to being the spiritual successor to the 400/800 (and, in turn, the VCS/2600) than the Atari ST was.
Architectural similarities, design philosophy of using custom chips for state of the art design (and accordingly high price when first released) and many of the same people involved. Not to mention that both started out as game console designs.
The ST was a product of Tramiel's "Atari Corp."- not the original "Atari Inc."- and reflected a very different "off-the-shelf" (as you describe) and "power without the price" approach. From what I've heard he sacked most of the existing Atari engineers and replaced them with his own people when he bought out Atari's computer/console division anyway. Not that much continuity between them beyond the fact he kept the 400/800 and VCS on, albeit more as cash cows with Atari Corp's shoestring approach to marketing.