Ultramarine Dreadnought

One of my many Warhammer 40K armies is now – finally – the Ultramarines. This time around I went for a 2000 points Dreadnought army that has 6 Dreadnoughts, 2 Masters of Forge with a retinue of servitors and 6 units of Tactical marines (ideally split into combat groups while deploying). I bought 4 Dreadnoughts from Forgeworld during summer 2012 and ordered a full set of replacement arms for them as well. That means that these dudes have all magnetized arms. I only have autocannons for the other side, but can switch the other side between plasma cannon, lascannon, assault cannon and autocannon at will.