I fully understand your predicament. Recenlty my partner and I decided that we should sell my car, keep hers for a run around and purchase a new car for the both of us. I love driving, and so I like you wanted something i would enjoy, something that would excite me. I also however needed to consider that she does not, its an A to B thing for her, and certain compromises needed to be made.
We are currently searching, and saving, something it seems you have done succesfully.
If you can afford it, then I think your decision comes down to value, and I dont mean value for money.
The biggest question is can you see value in having this car, does the end justify the means, what will spending the money mean? and what will having the car mean? if you can see the value in having the car, then the car to you becomes genuinely valuable, and that should be all the reason you need.