I have been playing with my rings and things set a whole time now, every day for about an hour, and today I picked up my old aluminium set again, and they were feathers in my hands. They are so light I can't imagine anymore how I used to play with them, in the beginning they were heavy in my hands, but now I am used to the much heavier copper sisti set. I love my new set, over the old one.

It is true, you can't imagine how cheap the cheap sets are, if you haven't handled a more expensive set.

Many have realized what you realized, including me. One can never understand why someone would spend 300-400 dollars on a set of cups until you actually handle a set.
However, it all boils down to personal preference and what one can afford at that point in their magic journey.
I gave away my first ever set of allum CnB set (not counting the plastic sets) to a younger magi who wanted to try out the CnB, "cheapo" sets still have it's place.