best ovulation sticks

hello guys!

I was told last November I had a slight case of PCOS. I am 26. I am overweight. I am going to start TTC this next cycle. I was wondering which would be the best ovulation kits to use. any suggestions. I have not been diagnosed with any other diseases. I am following a healthy diet now and have started working out. I do get my AF every month. my cycle is 34 days long. and I do ovulate. I can tell from CM. thanks!