Rhinoplasty or nose surgery may be composed of several procedures. If you have an adequate dorsum or bridge, then you MAY not need an implant. Emphasis on the "may" because the surgeon would need to see you to give you his/her professional opinion. Nevertheless, you still decide in the end.
Wideness of the nose may be caused by two things; more commonly wide nostrils, and a wide bridge/dorsum, which may also coincide with the bulbous or rounded tip. Therefore, and alarplasty and tip plasty would be in order.
Smoking may delay or prolong the healing process so it might be best to stop temporarily. It causes narrowing of the blood vessels thereby limiting the bloodflow to the area, which is vital in wound healing.
I do digital enhancement to see the possible result and this might help you in your concerns as well as your decision. I will send you a PM with regards to the price range.
I hope this helps.