Stay with what you have. Your existing accelerator has a much faster memory bus, can take more ram and has a scsi option I believe.
erm, no,
blizzard 4030 don't have fast ram or scsi.
Also i heard that there is some board called "X-Calibur" which will allow me to add additional ram to the board... Does anyone know anything about it ?
I've been watching ebay for amiga items for 5 years, I've seen an X-Calibur only once, and then it sold for nearly as much as a 060 accelerator.
so, don't count on it.