Here are my two cents regarding purchases specifically dealing with women trying to be frugal. I've been guilty of this plenty of times, and hope this helps in your decision making process when making purchases big or small.
Whether its a flat iron, or a sink mat - it sometimes is more economic to go with the top of the line, more expensive choice. Why? Because I always get the cheaper one, thinking it will suffice and end up being disappointed and spend more money on getting the better one anyway. So in the end I spend more.