While we're making wishes for the York Audio site, there's also no easy way to see the packs you do or don't own.
Once you're logged in, you can see a list of your orders, but it only shows the total amount (which i don't care about, don't know why anyone would), not which packs are in them, which would be useful for instance if you're moving to a new computer.
It'd also be great if you could filter the products list to show only ones you don't own. That'd be in your best interest too, since those are the ones people might buy!