If you let yourself think about it, you always get remorse. I try to keep my mind away from it. I mean, my car wasn't exactly like how I originally planned on getting. But, I just keep thinking of the advantages rather than the disadvantages. Did that with all my cars. Only way I stayed sane driving my Jeep cuz I hated that car. I got through 7 years of a Civic by reminding myself, "Thank God it's not the Jeep," even tho there are much better cars than a Civic. After enough times, I've convinced myself that the colors and options I did get on the BMW were a better choice than what I originally wanted.
And since you're in CA, just go out, drop that top, and take a cruise. Convertible offers an experience that just can't be replicated in a coupe. I was riding in my friend's Boxster today. Had the top down, enjoying the cool SoCal evening air (cleaner since I was in Irvine), and damn, I wanna get a convertible some time in my life.