IMO the Ikon Motorsports front lip (PP or CF) is the best-looking one for the Model 3. As for the rear spoiler, there are many options, many prefer the V-style, which is the one I have, but if I had to do it again, I would have gone with the CMST Ver.1 rear spoiler, clean and aggressive.
Also, I just did the rear glass in one piece, I did not do the roof glass because it is already heavily tinted and in all honesty, there is no need to.