I really sympathise with the space problem, but I think you're making a big mistake for one simple reason.

Whatever your preferences for the respective material that EC released in the 50's and Marvel in the 50's through 80's, I bet you are extremely well acquainted with the later and there is likely a huge chunk of it that you may well never read again. On the other hand, much of the EC material is quite probably an undiscovered country to you.

Are you a man who prefers the thrill of the hunt or comfy slippers and cocoa?