I found the thread further down the forum (
here) in which Kobo's official SleepCover is discussed extensively. I have decided that I don't like the sound of it. Here in the UK, the cheapest I can get it is around the £50 mark, and the general consensus seems to be that it's just not worth that much.
So I've been hunting and hunting for a decent cover in brown, to go with the espresso Aura HD. All the ones I've looked at on ebay, Amazon and various places all look awful quality in the pics. And I'm of the opinion that if they look bad in the pics they'll be worse in real life. OK, some are only a tenner, which isn't much just to take a gamble.
But I'm looking for the tactile experience that the Aura's hard plastic body fails to provide. I don't mind paying a bit extra to get a bit of decent quality, but there's a preciously small selection in brown. But I did finally find something. This site here:
noreve.com. They make what looks like beautiful quality luxury leather cases for all sorts of devices including the Aura HD in a wide range of colours.
Checking the firm's products out on the internet from people who have bought from them, it seems they are actually very good, high quality and quite classy. The Aura HD case is only available in black for instant shipping, everything else they hand craft to order and send out within 14 days. The price is around £50 including tax and shipping; more or less the same price as Kobo's own SleepCover. So I've ordered a cover in a vintage brown leather.