I vote A600 for the simple points of: came later then A500+ yet less capable
Every other model had a space/need in the line; the only reason for the A600 was to produce a cheaper A500 (indeed... an A300) but by the time it came out... people were looking up not down.
A1000: well, something has to 1st
A500(+): cheap and cheerful games machine
A2000: plenty of expansion possible
A3000: bit of an inbetween, delivers auite nicely bare, yet can be expanded nicely
A3000T: overpriced A2000 with extras
A1200: next gen cheap and cheerful games machine
A4000: to pricey if you (at the time) already invested in an extended A2000
A4000T: bleep :-) all of the above, but can't afford it even today !
blinking back... if the A500+ had not existed... but was released as an A600 motherboard in an A500 enclosure... then it would have been ok
just my opinion of course
Tom UK