That is quite an impressive number, but I looked at your collection some time ago and found only about 50-60 titles that I'd want (or already have).
I have about 200 titles (between VCR and DVD) and even if I could afford to buy whatever I wanted, I'd only be able to come up with perhaps another 100 that I'd want in my collection.
But, I guess that is what makes it special to each of us - it is OUR own tastes that determine what we buy and add.