Exciting! I love getting new prints. I don't think there's any perfect solution.
I use postbound albums and replace the posts with Snapload. (Snapload is a plastic system by the Pioneer album company, and I think their 12x12 postbound albums come with it already installed.) I like the album size and appearance, but the metal screw-in posts are a pain when you want to add pages.
I tried my first 3ing album this year for Project Life. I like the ease of opening and closing it to add pages, but it's so much bigger than a postbound album and takes up too much space in my bookcase. Also, my kids can hold and flip through a postbound/Snapload 12x12, but not a 3ing 12x12. For that they need a table and it's still unweildy. So I'll probably go back to postbound/Snapload next year.