Well my idea to wait for the sales went out the window! I ended up spending more than I originally intended (as ever), but I went for the slightly more expensive two-input 30W Topping amp:
http://www.amazon.co.uk/gp/product/B...?ie=UTF8&psc=1
and based on several reviews, these speakers:
http://www.richersounds.com/product/...co-2010i-graph
I'll let you know how things work out! Thanks for all your advice