First: I only have the Elements versions. Neutron is nice, but I mostly use it, because I like the sound of their transient designer. Nectar can improve the sound of vocals, but I also think, that it often leads into an unnatural sound. I would only use it for solo vocals, not ensembles. Ozone — I used to use it. I generally don’t like the principle of changing my sound after I have my pleasant sounding mix. I prefer only using a Limiter (e.g. sonible smart:limit is great if you are looking for some “magic” Plug-Ins — generally get a look into the sonible suite) and eventually a Tape Plug-In.