After my first (and to this point only) game with Deathwatch, I think that Black Shields with a lot of Wargear might be over-rated. For an 88 point model that only uses its special rule against very specific enemies, it is a pricey gambit. I am starting to think that just a Power Weapon would be a better option. Maybe on my next Black Shield.
In the meantime, I am going to stick to the "three Terminator" worth of points version of the Black Shield. As of right now, I have only one bit to make a Black Shield left in my collection. the bits run for about $4 on eBay but maybe I could swap for one or two on Bartertown.