Most of the chips in the A600 are surface mounted, rather than socketed, although if you do have a socketed Fatter Agnus from an A600 then it should work.

Failing that, A2000/A1500 chips should all be compatible with the A500.

Or look for an A500 Plus, as that will give you a proper ECS A500.

For the most out of WB consider Kickstart 3.1 also, as you could then use Workbench 3.1 and if you have a sidebus HDD you could create a good HDD setup.