I didn't understand the cup-and-cone bit either (it was even mentioned in some stuff from Fulcrum iirc) but I had a little look before I mounted them and they are definitely sealed cartridge. Same with the axle, it's 20mm internally but standard QR ends. Apparently thereäs no way to change it for 20mm thru-axle.
£135 is very good. I got mine from Germany for about £150 inc. postage, which was still at least £40 cheaper than any UK store. I think it was actionbikes.de where I got mine. They have a lot of 'lowest European price' guarentees on their stock, so it might be worth a look there if you haven't already.