I know exactly how you feel. My F430 is also my first F car. Its taken me a while to reach the stage where I can afford to own and run one, and all the hard work is worth it.
I also considered the Gallardo, and yes, that has 4wd, more power, is on paper quicker, but I couldn't tear myself away from the Ferrari brand. Its something Ive had in my mind since being a boy. The Ferrari brand/badge just generates all sorts of images and emotion.
As coicidence woul have it, my neighbour recently bought an Lp560 roadster. It certainly sounds nice - dare I say it better than the 430, and no doubt its faster. But would I swap I asked myself, and given the choice of the two, no, I wouldn't.
I would certainly own one in addition to the F430, but no way would I swap. Perhaps once I have had a year or two with the 430, then yes I may try something different. But right now, Id still take my own keys out of the bowl thanks.
PS on a sound point of view, the chap across the road who has a Masserati 4.7 GT beats both myself and the neighbour when it comes to a pure sound contest. Im hoping tubi for the 430 will get me somewhere near that sound. It makes me tingle