A lot going on in your post here
I'll try to project my thoughts as to what I like to use. And first off, let me be clear...there are many ways to "skin a cat", i.e. detail/polish a car. Many people have products they like or are used to...mainly because they used it and they like it. That's a big part of using something that works for you - someone else can't specifically say what will work for you and what you will enjoy seeing. Again, I will try to project what I like...
I personally like the Poor Boy's line of polishes. They seem to do the job just right. I have a black car, and this is what I accompished with using JUST poorboys and a little Collinite wax:
http://autopia.org/forum/showthread.php?t=72714 More is explained on that thread of the process.
If you like Zaino, stay with Zaino and experiment with them. Otherwise, choose something else. Look in the reviews section for what people are liking right now, that should give you a good idea where to start too!