There is nothing better than a good mare. Don't let her female persuasion predjudice you against an otherwise great match. She looks really nice from what we can tell from the pictures. Don't rule her out.
I like her a lot, and you know I think mares can be great. Plus, if she is well bred/built, you could always breed her if she didn't work out for you. She looks to be in good shape - how long has she been off the track? I can't see the ankles well enough to have an opinion on that . . .