Contemplating between CC7 or XM2+ or Hankook eco2
Not sure which one better

This is just a too generic statement. I have been using CC6 then XM2+ and now CC7. No doubt the XM2+ is slightly better in wet, but I didn't face any major issue driving at >80km/h during heavy rain with CC6 or CC7. The only thing need to avoid is hard braking in wet which I don't think XM2+ can help either. The comfort and quietness are both superior on the CC7 than XM2+.

Well, you have to understand that people who commented CC5 or CC6 are crap all drive like F1 drivers on the roads. I've driven on CC5 before, no issues whatsover.