Depending on budget there are a vast amount of solutions.
I would recommend a powerline + wireless plug kit solution.
Check out Edimax 200Mbps Powerline Wireless-N150 Kit for £39.99 including free delivery.
Simply network plugin to the superhub or your router, this will then run the network through your electrical plugs in your home to wherever you wish to plugin your wireless access point. All security protocols available. Competent network admins can configure this easily.
I would not recommend a single wireless repeater or booster product as they usually have more problems regarding bandwidth and weak signals.
Given the well documented SuperHub problems I'm using an old Belkin Wireless G router in Access Point mode connected directly to my SuperHub, which has wireless disabled, plus a TP-Link Powerline adapter also connected to the SuperHub and a TP-Link Wireless N Powerline Extender in the living room to add range. This is a reasonable combination but given the compact nature of the TP-Link Powerline Extender (ie no external aerials), its range is a bit limited. If you need range go with something with decent external aerials, but recommend PowerLine as an ideal means to set up a simple home network.