As mentioned in my previous post, I wanted to complete this project and do so on a budget, my goal was to complete the army for around £100 give or take a little. In the end I brought two standard boxes of Deathwing terminators (£70), 5 squads of Deathwing terminators from Dark Vengeance from eBay (£35), two second hand Dreadnoughts (under £10) and the metal librarian (£5). Totalling around £120 I as very pleased to have all the parts for a 2K army.
It could have been done with just the Dark Vengeance terminators, but the repetition would start to show and you couldn't have cool stuff like the Knights and the robed command squad.
I started by building a squad of the DV guys purely as designed, I then started building with weapon swaps and bits from the Deathwing box, changing arms and poses where I could and using some of the different shoulder pads and weapons to add veriety. The next phase was raiding the bits boxes of people I know. This got me the Grey Knight heads for the Knights, and extra body for Belial and bits to repair the Drednoughts.
Overall the use of the DV models blends in well and with enough weapon swaps and repositioning its unnoticeable as the same model. The key was not to use the same base model more than once in a unit.