This is what I have http://www.amazon.com/gp/product/B00280MVAC?ref_=cm_cr-mr-title
It was rated in the top 5 push mowers in 2014. I have about 1/3 of an acre and it does the job well. Starts in one or two pulls every time, cuts well and does not go though a lot of gas.
I did not get a self propelled mower because the cost more, I figured it was more parts that could break, and I like the exercise anyway.