Like you, I prefer the coupe to the targa. Having said that, I would put the 911 in storage back east for a while. Keep the Giulia as a weekend fun car. After all, having an Alfa close to the Rockies...try to live with that hardship.
Later you can make a decision about whether to spruce up your 911 or maybe the right trade will come along. Don't make any hasty decisions.