It's getting tough to source quantities of 68060s, don't expect anything there.
And the 68040 is a hot chip. I had an A1200 25MHz 68040 accelerator back in the day, and it had a fan and it was noisy and barely fitted in the trapdoor.
Maybe the FPGA Arcade softcore will evolve to a state where it competes in overall performance with a 68040 or even higher, and then Jens could create an ACA12FPGA running that soft core, using a modern FPGA to get the most performance out of the soft core. I wouldn't worry about putting money aside for that right now though. Hopefully he can find some more 50MHz+ '030s for more 56MHz ACA1230s.
I don't have much faith in the Natami project to come through with their 68050 however. The project is pretty much dead.
