I'd take them as Elites if possible, but then again, I only use Honour your Wargear in one of my lists and that's because I've already filled up my HS slots w. Predator, Whirlwind and Land Raider (lol, Iron Warriors).
In any case, I like to deploy my shooty units at a good spot, pereferably in cover and with a sweet lane to shoot from, in which case it's always better to deploy after your opponent has finished deploying his Heavy Support.
Also, if you take them as Elites, they have access to Tank Hunters and Infiltrate, and both are quite useful to the Devastators.
Purg