So, multi-facited (sp?) question. First off, what example do you want to set for your kids and how does climbing play in to that. I made it very clear to my wife once we found out she had a baby in her that I plan on volunteering for any deployment I can to Afghaniland. Its a message, even if I get killed, that i want to send to my kid. Same goes for climbing. There was an article a year or two ago about a climber who died and his daughter thought he was living life and was proud of him. Its not only a matter of risk, but the reason for taking it, who you are, how you manage the risk, and what it means. To say "having a kid means soloing is out" is narrow-minded and ignorant. That stance just shows your lack of an ability to deal with risk and teach about consequences. If its your personal choice for that stance rather than a blanket statement, that's very different (I hope my explanation sufficiently gets across the point I'm trying to make).
For me, soloing is an option based on the information I can gather about certain climbs when I look at it. I've left top-rope climbs undone because of the conditions. plus, there's good ol' mother nature that can kick you in the Jimmy when you think you have a handle on things. Some climbs I've solo'ed are safer than leads I've done. I also have no qualms asking for opinions of my party about a decision. Humility and being humble are key traits, IMHO, when assessing risk with high consequences. If setting a standard of no soloing helps you mitigate risk, then so be it. Its good that you have a personal standard. But, realize that is just that, a personal standard and it means nothing if you can't analyze a situation when there's a rope involved.
A rope, anchor, and belayer don't necessarily make you safer if you can't analyze a situation. They just mean you won't die alone.