Hello Cesar: Sounds like we have similar hobbies and I just purchased my first compressor. After doing a bit of research here are some key points to consider: 1. Do you need a mobile unit or will stationary work okay? 2. Do you have 220V available or are you stuck with 110V. 3. Available space. 4. How much do you want to hear your compressor run. I did a lot of price shopping and found Menrds had the best price. Almost all equipment is similar unless you go with a real industrial compressor. Compare HP and CFM. I run impact drivers, nail guns, and everything else on a 7HP, 220V, 60 gallon, stationary compressor. You can get a unit like this for around $350. The large tank gives makes keeps the compressor from running continuously. Good luck and have fun shopping - that's the best part!