Kanzenban vs. Shinsōban - which one should I buy?

Hi,
this is more directed toward people who have experience with japanese manga.
I recently hit level 10 and together with some grammar resources I wanted to make my first ever order of japanese reading material. I put things like よつばと! in my cart, but I also wanted something that I always wanted to read. So I decided for SLAM DUNK, which is for sure far above my level, but I’m primarily bying it as a goal I want to work towards and something I can reward myself with, once I’m good enough to read it.
On honto.jp I found two versions - kanzenban and shinsōban. As far as I’ve understood, kanzenban is more of a collectors edition with orginal magazine covers and colored pages, while shinsōban is a reissue with partly redrawn pictures and new dialogue. While I’m mostly a fan of “the original experience” I’m wondering wether the new dialogue, etc. might actally make for a better story. I think it’s done by the original artist, so I if that was the case I’d rather go for shinsōban.
To formulate a specific question: Does anyone have experience with these kinds of manga versions? And if so, how do they compare and what is your typical recommendation?
Thanks in advance!