I need professional advice (please) Cosmetic Orbital Decompression or Lower Rim Implant?

I am in the orbital rim business.  I do not recommend orbital rim implants for you.  You would to great with hyaluronic acid fillers at the orbital rim.  You can't go down the street for this service.  You likely need about 2 ml of Restylane under each eye.  It is a fussy service.  Orbital rim implants are important when the lower eyelid has been wrecked and there is a lack of bone projection.  As a primary cosmetic surgery, orbital rim implants are far from idea.  In considering an orbital decompression, it is also important to understand that this surgery has a very high risk of causing permanent loss of vision due to orbital hemorrhage.  Studies of orbital surgery and orbital decompression suggest this rate of visual loss might be as high as one in 500 cases.  That is an extraordinarily high number that temper anyone's enthusiasm for such surgeries. 

Either option (orbital decompression vs. lower orbital implant) is possible, each with pros and cons. Best to seek personal consultation with experienced orbit, oculoplastic surgeon. See link for published manuscript on orbital decompression in patients without graves disease.

You do not have a true orbital proptosis, rather you have a significant infraorbital-malar skeletal deficiency. Infraorbital-malar implant augmentation would be the correct procedure. Such implants are best made in a custom fashion from a 3D CT scan.