Yeah. I'm sort of crazy about the ACA520 as well as the Indivision MKII.
There is a A500 everywhere, if it could easily be upgraded with 68020, 8-16MB fastmem, and a harddrive, they wouldn't be bad for WHDloads. It's just a matter of prerequisites, and price.
Might end up needing a bunch of ACA520's for my friends, along with a Indivision for the A500...
*hint* Make sure there are plenty of Indivision ECS units available when launching the ACA520 ;- )*hint*