USB Hub / External Card Reader recommendations?

Afternoon,
I have recently purchased a late 2012 27" iMac and would like to add some peripherals.
I am looking for a USB 3.0 hub and a multi card reader.
I have seen lots of posts about USB hubs (the joys of a google search) that either arent recognised as 3.0 or are on American sites. (Am based in the UK).
I know there is a card reader on the back of the iMac, but only for SD and I would prefer to not have to keep turning the monitor round to reach it. (I still have xD cards that I use).
Without being too picky, I dont want 'ugly' units. Dont want to make a beautiful machine look ugly when surrounded by lots of horrible looking external add-ons.
Does anyone have any recomendations of hubs / readers, or even ones to steer clear of?
Thanks very much.
Karen

Thanks for trying but ...
No, I can't see the drive when booted up with Cmd R.
I don't have a USB hub to test on.
I'm just tried resetting the PRAM as you suggested.
No change.
Any other ideas gratefully accepted, otherwise, I can book into the genius bar thingy - no idea if that will be of use. I work in IT so I'm fairly handy though there are many mac specific commands & tricks I'm not aware of.

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