I had a BPPC with 175Mhz 603e and later sold my A1200 and got a CSPPC 150Mhz. I was very surprised how much faster it was (in emulators, games, benchmarks) even though it was slower Mhz it was at least half as fast again as the BPPC. 604 is a very nice processor, even beating faster G3's in many tasks.