I think you have made a wise decision to purchase an entire set of all colors. I did and I can't tell you how many times an embroidery design called for some weird color (for shading) that I would have never purchased on my own. I agree with the other posters. You will need to decide on thread fiber, with poly and rayon being the most common. Then get a couple spools from various manufacturers. Some machines are very fussy about thread and you want to make sure that the brand you choose will play nice with your machine.