The A500... it is the quintisential Amiga... it defined home computing for about 4 years. It was powerful, cheap and fun. Everyone had one.
I like the A1200, as it was the best designed of the Amigas... but it was released 2 or 3 years too late... the after about a year it already seemed dated. Still I trudged on with mine (upgrading the damn thing like crazy) until the year 2000... When the call of the 600Mhz Athlon became too great.
The Original Commodore A4000T was beautiful.
But the 1.3 A500 is my favourite. That is one machine that will stay in my heart forever. I still have one in the cupboard.
