I'm a little late with this, so I'll jump right in.
By far, my favorite purchase for the month is my Clarisonic Mia 2. I love the way my skin feels and looks after a couple of weeks of use. I use it morning and night and couldn't be happier. I have also noticed that I am less oily than normal. The true test is coming in the summer months when I produce more oil in my t-zone than some off-shore oil rigs!
My second favorite for the month is the Make Up For Ever HD foundation and powder. I bought it a couple of weeks ago at Sephora and the color chosen for me (by the sales associate) #120 Soft Sand. I bought the kit for $79 which included the Microfinish Powder, application brush and High Definition Primer. I was unsure about switching to a liquid foundation from my all time favorite MAC Studio Fix. I am impressed with the coverage and the look of my skin with the HD foundation. My face also photographs much better in this foundation. I do have to reapply in the middle of the day, but that isn't unusual at all for me. I've given the primer a shot but I don't think it's that great. I'm going to try it with my Smashbox Antishine to see if there is a difference.