Does the vampire need a significant redesign to add all the extra goodness or can we simply put in a pin compatible (or as close as possible) memory and fpga upgrade at little extra cost?
I simply dont know what the cost is for each potential change. If we are taking about up to £10 to add an extra 64MB of ram then yes, as much as possible within reason. However, if it ramps up the cost significantly then that will be more than the majority will pay for and just leave the vampire600 as is and build something entirely new for those of us who want it. I'll be more than happy with the existing card in my A600, but could stretch to double/triple the price for a meaty CD32/A1200/big box variant.
What you and Igor, etc. have done with the Vampire600 is amazing.