How can you follow Jimmy Cagney??? What a wonderful personality!!!
With respect to the question at hand......
I chose the P5, even though I don't have one anymore. It is a great design, gotta love the combo decocker / slide release. It is accurate and reliable. I prefer it's DA/SA to the P99 as I find the P99 trigger just a bit harder to get used to than the P5. I have more confidence in myself with the P5 if the SHTF than a P99.
In the end I like the P5's aluminium frame better than plastic. I don't mind the single stack or the heel mag release - because I don't think I would need more than eight or nine shots .... unless the mutant dead start rising - it is close the Halloween, and I have other plans in case that occurs.