Here is a link to info on the GVP-M 68060 accelerator...
http://www.gregdonner.org/gvp4060/solutions-help.htmlIt's a good design but the SCSI drivers in ROM are broken. There is a Guru ROM already programmed (but not burned) that would fix the problems though. If GVP-M added 128Mb of more modern faster memory already soldered on the accelerator (would fit better in a 3000 then too) and put a socket for the oscillator as well as added the Guru ROM I would be interested at that price. Ultra SCSI with user programmable flash ROM and MAPRom support and I would be even more tempted.
As far as the Spectrum goes, it's really slow and there were some reliability problems with them. The Spectrum is on par with a Picasso II but with different problems. I would get a used CV64 for a 3000 first.
