If you don't know one already, I suggest you start looking for a fee-only financial advisor/consultant. They're all over, so make sure to ask for referrals from people you know. Your bank likely has one, and there are plenty of franchises of Ameriprise, Edward Jones, etc., around the country.
Not only will an FC help you with your personal/family retirement, he will be able to help you set-up a retirement plan for your company. He'll also be someone to go to when you have any kind of financial questions (lease vs. buy a car, etc), and will be right up there with your CPA and lawyer as far as professional advisors. And just like those professionals, they will save you much more than they cost.
A FC will very likely advise you to go with a SIMPLE IRA. For employees, it's basically the same thing. For the employer, it requires much less work ($) to administer. The main disadvantage is smaller max contributions ($11K/yr), which is obviously a problem for highly-compensated employees and employee-owners... which you probably don't have being so small. When it becomes worth the administrative costs, you can always upgrade the company plan to a 401k.