Your number 1 priority in loosing weight is nutrition. All these pills and workouts will do nothing for you if you aren't watching what you eat. I just bought $150 in fat loss supplements for this month, but I already calculate everything I eat and am already loosing weight, the supplements will just make me loose faster. If you are not loosing any weight and watching your nutrition right now, the pills won't do you any good.
With that being said. A good and cheap combo is the EC stack. If you want something else, try one or a few of the following HEAT, DCP(TTA burner), Slin-sane(nutrient partitioner), and Lean Xtreme(cortisol control, great for low calorie diets or when stacked with EC)
But again really, watching what you eat will make you lose more weight than any pill on the earth.