Just because you have a crown, doesn't mean that the tooth has to be sensitive, especially if the preparation of the tooth for the crown was conservative, and did not approach the pulp. Each tooth has different anatomy. Also, the pulp responds differently based on the number of times the tooth...
I would not have an issue using a Zirconium abutment in this situation. The restorative doctor needs to be sure that the crown does not take a great deal of occlusal forces when you close. That will drastically reduce the risk of fracture and improve the aesthetics...
The fees you presented seem more than fair. If this is a stretch for your budget you might consider trying to become a patient at the dental school in Los Angeles. Prices are reduced and students will do your treatment. Hope this helps.