Have a look at the Ampeg BA210, as well the Fender Rumble 500. Both look like seriously good amps, relatively light (around 17-18kg), with the added bonus that you don't have to buy a cab (unless you want to use the full wattage).
The new Hartke HD500 combo looks very interesting indeed as well. Similar concept to the Ampeg & Rumble, 2x10, Class D combo, 17-18kg, but it's priced about £50 cheaper than the other two. The downside is, that I haven't seen any for sale from any UK sellers yet, but Thomann and other German retailers have them. They do look like a good alternative to the other two.
Like the look of any of the three, preference is leaning towards the Ampeg, but both the Fender and the Hartke have some really good features... Pity I'm skint.