CMS Options for Small Business

I need some guidance in terms of the technology stack to choose for simple small business websites. I've had experience in .NET and Java for the back end. Occasionally worked with some Wordpress sites. I never did much development in PHP and so never was a big fan of Wordpress. But I always have people around me that want a website for their small business or just family and friends. At this point, I'm thinking do I just give into the who LAMP stack and start learning it as I don't see any open source good/easy solutions in Java and .Net or I should say that there are options but not sure if they can be a good replacement for Wordpress. Ideally I would like to keep developing in Java. I already have so much on my plate that I want to learn and adding the LAMP stack just makes my goals even difficult.

Any advice?

Thanks