I am in the market for a user-friendly stamp press machine to use on small leather accessories such as a leather credit card case. The machine will be used to emboss a logo on the leather. Not sure if I should go with heat or non? I am very particular about quality. I will not be using foil, but may want the option down the road. I have spoken to vendors and the recommendations I am getting are the following: green machine, model 25, and 55. Any feedback regarding model and vendor recommendations would be great. Thanks.