July
Good advice above. Nothing wrong with your Samick Sage. Once you get your shooting form and accuracy under control, you will be better informed as to what weight, and length bow will be the best fit. I don't think you can make a decision as to what you need right away. With more time practicing, you'll be more prepared to make a choice. If you're a crappy shot, which you're not, a custom made bow won't make you better. Learn to shoot the beans out of the Samick, work on your form, and by all means as advised above, go to shoots, try different bows and see what you like. A longer bow, less or more draw weight, what brand, and grip style are a few decisions to be made.
Good Luck
Deno