I usually like to see the "bigger" horses closer on a pedigree when breeding but your mare definitely doesn't have bad bloodlines, I love the foundation bred horses. Have you done anything with her showing wise? Just because a horse has nice bloodlines doesn't mean they should breed.
Lol I know the feeling.. I'd show her a good bit before deciding anything, see if she can pass on any skills to a foal, there's just a lot to consider before breeding. Especially if you're wanting a foal you can show in the future.