Champ man 02 03 will be what football manager is now. After Sports interactive split from EIDOS there are two different games now Championship Manager which is meant to be pretty bad and Football manager which is still the best manager game out there. I dont think Football manager is avaliable for the PS2.
I've got CM5 on PS2, its alright, but there's lots of little things on it that make the PC versions superior.
I haven't played any other manager games on PS2 so I don't know if Champ managers the best. I haven't found it as addictive as the previous games on PC.