A500 accellerators?

[doctorq]

The chip ram expansion isn't needed, but it's highly recommended. All graphics the computer displays depends on the chip ram, so the more the better. With only half a meg of chip ram you run out pretty fast if you want to use colourfull icons (NewIcons, GlowIcons), etc.

[doctorq]

Nope. Only way to avoid chip ram being used for graphics is with a graphics card, but that's gonna be a bit overkill and not very handy.

I would recommend getting the accelerator and harddrive controller first, and then you can find out if you really need more chip ram or not.