You'll have fun with them.
A friend came over the other day and I decided to pop in my SNES cart of Zombies ate my Neighbors for some 2 player action. I was saddened to find that I wasn't having any fun with it anymore.. Didn't hold up for me.. We put in The King of Dragons instead. Even if the arcade version stomps it it's still good on SNES.
Zombies might be going on ebay.