That's a good question, but one that I don't think has a black and white answer. I guess it depends on A) what kind of tactics your team uses mostly, and

how much you need to spend for a center to be competitive in your league. I am very happy with my two main centers. They play d, they board, one of them can pass, they are good free throw shooters, and they can score. My team salary for my 9 main players is $463800. My two main centers in this group take up 33% of that salary. I prefer a balanced team that can play any tactic fairly well, and I have yet to pay anybody $100000+/wk, so my figure is probably not representative of most teams.
Once I scored a basket that still makes me laugh.