So, 2 days later, i tryed Gigapixel and Denoise too, i made a few outputs, and finally buy Gigapixel, specially cuz for somebody like me, wich i dont have a powerful 6 or 8 cores processor (i7 3770k 4c/8t), this allow me to render smaller resolution images, in a razonable amount of time, and is even faster if i dont use PT, this make worth the price IMHO
Said all that, here is a final(? render, i feel there is still a few details to improve, let me know what you think guys. The image was refined in PS.