The 5500 is far preferable to a 5400 (if there just happen to be any of these in the bunch grab them), but the 5400 should be preferable to the 5260 due to both PCI and the fact that the 5400 runs Yellowdog Linux too... whereas none of the performa 52XX, 61XX, 62XX, 53XX, nor 63XX's will except the 6360. Andrew