The OP wants full 50%. Meaning 3.5 full days a week with the kids(Which usually ends up being a "you get them one week, I get them the next"). Ideally he wants custody and her having to beg time with them I think, but that will not happen.
IWinyouLose is coming on a bit strong in his approach, but he is very correct in his assertions that women held all the cards in Custody battles in the past. The trend is shifting as the old fart judges who still remember the Tender Years Doctrine die out and younger reasonable Judges replace them.
But if he were wrong, then it would not be men applying for "access" to their children in 85% of the cases statistically.