I have a dual 500 G4, Gigabit Ethernet model and am looking at upgrading the processor. Everything else being equal, is it better to have a slightly older, faster processor with no L3 cache or a newer, slower processor with L3 cache? In this case a dual G4-7457 @ 1.3GHz with 512K 1:1 On-Chip L2 & 2MB L3 Cache Per Processor or a dual G4-7447A @ 1.7GHz with 512K 1:1 On-Chip L2 Cache Per Processor.