Note: I'm usually no one the big traveling on a budget, but I was very scared ....
But since I also wanted to work with markers, I looked around for a cheaper variant and reached for the "Alpha Design marker". I've read the feedback and actually had only one fear: The leakage described. But I was pleasantly surprised! No leakage! I work with slightly thicker paper and have no problems at all :)
The Alpha Design marker convince in opacity, color intensity and price!
Hence my recommendation to all amateur artist: take the Alpha Design marker. They are much cheaper and can easily keep with Copic markers :)
(I personally find even better ...)