Being new to Mac, can someone help shed light on which of the these two G4 powermac configuration yield the best performance. I. CPU Type: 2.1 # of CPU: 1 CPU Speed: 800 mhz L2 cached: 256KB Bus speed: 133 mhz Memory: 1GB II. CPU Type: 2.9 # CPU: 2 CPU Speed: 500 mhz L2 Cache: 1MB Bus speed: 100 mhz Memory: 1GB The first config I think is a newer G4 model. Does having 2 CPUs in config II compensate for the slower bus speed? Also, can Leopard run on any of these configurations without noticeable lag? Both currently on Tiger. Thanks for any input.