Much depends on what type of workout you are doing. For instance, if you are doing lots of supersets, dropsets type of weight workout...i.e...little rest time, you can probably get by with minimal cardio.
However, if you are doing more rest interval standard type training, you will more than probably need much more cardio. I have done both, and have had good luck both ways. I do hate cardio, so I opt for the short duration rest times to keep my cardio to a minimum.