3. A500 - Better expansion than the A600, but still not good enough.
4. A1200 - Technically better than the A500 (but then, it did come later...), but still crap expansion, and a crap case.
what?! are you out of your mind! the A500 is a classic! A powerhouse at the time, you didn't need anymore then a memory expansion and the people who wanted to, could attach a hard disk. believe me, the expansion part was _no_ problem at the time. people who wanted to buy expansions and had the money simply bought an A2000. In fact it was plain stupied to buy a A2000 if you would not expand it!
same thing for the A1200, beauty in a small package, it was complete right from the start.
you have to remember that these things came out in the 80's and begin 90's. i don't know, but i think my 500 lasted for 5 years without the need for an expansion (except memory upgrade :-D ) and at the end i could still play all the latest greatest games.