Health insurance is an even bigger factor once you consider kids. I went to work for a startup which at the time I joined did not offer health insurance. I was able to do that mainly because my wife's plan covers her, a spouse, and all dependents, free of charge. Now that my company offers health coverage, it is free for me, but a spouse would be ~$200/mo and dependents ~$400/mo. If you have a spouse and 2 kids, you'd be looking at $1000/mo difference between the two companies.
