I'm over 45 and I use MAC. In fact, I swear by MAC. Go into an upper scale dept. store to see if they have a MAC counter. Let them do a mini makeover on you to see what products they recommend. MAC employees are very knowledgeable about the products and skin. I love it! I use a primer and then a foundation, with powder over the top.
I sell Avon and I would recommend our Perfect Wear line. It has a built in primer so it covers very well. Also it is made to wear all day so it will still cover as well later in the day as the morning. My website is c-theavonlady.com