I say keep them as is forever and write a good will. Who needs CGC unless you plan to sell. If you plan to sell, best thing you can do is get them pedigreed and sell them yourself on ebay or hire someone to set up your own website. At 1000 books even if they start to get "worse" (ie Feature , Popular, etc) you are seriously looking at nearly $1,000,000 in comics and more if you have a Tec 27 in grade (which I feel is coming). I feel kind of dumb profering advice, just hope no jackals snarf a couple up from you.
BTW, please allow for the entire comic to show in the scanner, its nice to be blown away by a book and not have to wonder if there is any little glitch where you can't see. Plus poor Ebayers are notorious for cropping images of low grade books and making them look like they are "sharp" This isn't the case with your books, clearly but these gems aren't being presented in their best light. Actually, they look great all except for the top edge.
I'm shocked by the Adventure 40 but those Weekly's are pretty sick too. Not a collection you see everyday and especially one that hasn't been bought by a major dealer. Great to see the original finder showing them off.
Ed