Well you need to overcome women who would want to vote for a woman in 2008 if a Hillary is on the ticket.
Women might just vote Hillary to get a woman into the history books and if that appears to be the case, we need to either overcome that decision with another woman or have a back-up Reagan to run in 2008.
I understand your point, we need to deal with the potential 2008 issue. Depite Hillary being polorizing, she is still classified as female.
The most conservative women I can think of are Ann Coulter and Laura Ingraham but they are not politicians and I could never see either of them moving to the center just to run for an office.