Reply to Vinyl Collection - How much space does it takes?

Hi guys!

I just scored something like 400 vinyls for very cheap and I'm slowly getting through them, classifying them on Discogs and listening to them. Now, they're all over my living room floor, by genres and I'm wondering how much space that will take on my wall.

I'm most likely going to buy a bigger Expedit bookshelf from Ikea. I already have a 2X2 one under my DJ booth so 4 "squares". I was wondering how many more "squares" I would need. So for those who use Expedit stuff, how big should I buy the next one? 2X4? It does sound like a bit of a stupid question but I jus realized it's quite hard to judge while vinyls are all over the place...

Thanks guys