The most common reason why these DCE made PPC boards fail rather quickly compared to Phase 5 models is heat. The fan that goes over the PPC heatsink was of very poor quality and usually it either completely failed or did not produce enough cooling (it's a 5V fan). By simply replacing this fan with a better one (a quality 12V fan from Startech or Sunon), there shouldn't be any problems.
Still, back to your original query...yes, an 060 is very nice to have. I have a spare Blizzard 1260T model (running very cool) with a true 68060 60Mhz chip clocked at 66Mhz. If you want, we can trade with me adding some extra cash. Let me know if interested. :-)
