Hi Helene,
First off, I think that you have enough variety of weight workouts in your current collection to accomplish your goals. Of course, I don't know how long you've been using any given workout. You may need to give yourself permission to use heavier wieghts and stop earlier, or adjust rep speed when you are trying to make gains. You also may need to monitor your results and tweak your w/o's accordingly.
I like the gym styles just slightly more than MM. The band work in the GS w/o gives my muscles a little different challenge as does the ball work in the leg w/o. This challenge was a pleasant surprise.
It might help you to know that I was looking forward to an updated replacement for PSS. So, this is the reason that I wanted the gym styles. It also might be helpful to know that I have been preordering Cathe workouts for as long I can remember. The preorder prices are very good and this makes it affordable for me to order all her workouts. After a while, I like to have a change in music and general production, but keep the same style of workout. Cathe gives me just enough of familiarity yet she adds enough of a change or twist to keep me coming back.
Since you are down to the last seven pounds, you may want to take a closer look at your diet. Your metabolism may have changed a little at this stage in life. Also, good nutrition will support your fitness regimine.
Your friend in fitness,
jordan