i found a mini hopper for theo in a charity shop, if anyone is interested. shame it's white, not red, but it is perfect for him to get going on - he loves it.
If you want to put them on a bookshelf, you'll need sealed enclosures or front ported. Front ports put a limitation on the size of the front baffle, which leaves you with a sealed box.
My understanding is that modern port design provides more advantages
Pfft - 10 inch drivers...