Just reading this post stresses me out! I am the opposite of a hoarder. As much as I love looking at beautiful fabric stacked neatly on shelves it makes me crazy if I exceed my allotted storage space! DH is a completely different animal. If we didn't have a designated, out of sight storage area for his junk I would feel homicidal all of the time! Really hoping that I don't outlive him and have to deal with it!
I think you will find that most people who have made a big purge of possessions of any kind have few regrets and find the experience to be quite freeing.....because it isn't just physical baggage you are carrying with you when you are so attached to your material possessions, it is emotional baggage as well.
Good Luck and I wish you much happiness in your new home.