The Kindergarten Question

From the moment I new I was pregnant and having a summer baby, I have felt pretty strongly that I was going to wait until she turned 6 to put her into Kindergarten. This being said, now I am finding myself unsure of that decision. My oldest turns 5 this summer, approximately 4 weeks before school starts. So now, I am wavering on the Kindergarten question. Do I start her in a class where she will be among the youngest or do I wait one more year, as I had originally planned, when she will be among the oldest in the class. I was held back and attended pre-Kindergarten because I was a June birthday. So my perspective is only of being part of the older crowd. The only advantage I really remember was being 16 before most of my friends. I don't really know if I would have struggled more being a year earlier. Most of my elementary teacher friends say that since my daughter is a girl, it's a no brain-er. If we were talking about a boy, it's a little tougher for them if they start too early. My concern is that if I wait, she may be bored by the time she does start, then the struggle will be keeping her interested. But if I start her too early, she will grow to hate school because it is too hard. That being said, she seems to be hitting the benchmarks for kindergarten readiness (based on my research, that Masters in Education is coming in handy, if not lucrative). So if I don't have that excuse then I guess I have to admit that I have a fear of turning my precious, innocent, little girl out into the world. Where she will be exposed to harsh words and harsh realities. Maybe that is the biggest thing that makes me want to keep her out another year.