If you want a kicking A500 then get a kickstart 3.1 and a scsi controller in your A590 (or a A590 with a scsi controller inside). You can forget about OS 3.9 but it is perfectly possible to run OS 3.1, providing you have a bit more than just 512 Kb Ram. The scsi controller will also allow you to use up to a 4 Gb harddisc if you don´t make any modifications. If you use another filesystem that is modded then you can use everything over the 4 Gb barrier I think. But 4 Gb on an A500 is enough to start with. The controller may also allow you to use a scsi cdrom which is very cool is you´re only used to floppies !!! I used to have a Mtec 68020i in my A500+ with 4 Mb Simm on it, and that really rocked at that time !!
