You may not care, but, I'd go for TRUE fast ram.
Ram that goes into a 32-bit accelerator and ram in a sidecar (like Supra 500RX) is usually true fast ram (the CPU does not have to wait for access to it).
Ram that mounts in the trapdoor (AdRam, etc) is all slow ram (addressing is derived the same as chip ram, the CPU must wait it's turn).
The Supra 500RX is smaller, very compatible, and not too hard to find. It can host 2, 4, and 8 Megs of true fast ram (8 megs may not be compatible with other side expansions).
I wish Supra had combined their 500RX, Turbo 25 MHz, and SCSI interface in one device, grin.
