3d drawing of hardware we are designing

Basically I have 2 pieces of hardware that need to be drawn in 3D. I am happy with one of the HW pieces and just need a "beautiful" representation that will need to be modified after the client makes adjustments. The other unit has certain pieces that need to be put together in an aesthetically pleasing way.
We are a company in Vicenza,Italy with international clients. The focus of our work is RFID hardware. The scope of work will be use creativity as part of the design process. Then meetings with the client will require additional modifications.