As far as lapdesks, I can wholeheartedly recommend the COUCHMASTER® Cycon - since OCUK sell the Corsair K63 version, I won't link to it, but it works out £15 cheaper from a well-known rainforest.
I'd tried the Roccat Suva, a basic adjustable lapdesk from the rainforest, a memory foam laptop stand, before giving in and spending the $200 importing the Cycon.
If you already have a decent wired KB&M, then grab it - saves buying another set of peripherals. If you have a wide enough space on the sofa, it's worth every penny (if space is tight, then their smaller lapboard is excellent too).
I use mine with a Ducky TKL KB and Secret mouse - I have a 5m USB3 cable running from the media unit to the sofa, then everything plugs into the Cycon.