Grey Knights are something that I am seriously considering as I continue to pour over the codex. The flexibility and ease of how to make this army is one of its luring appeals to me.
Here is a short excerpt from GW on the new release and the 4 units this box set can make following the pics
The Grey Knights are the most mysterious of all the Imperium's many organisations. The most advanced psychosurgery and bioengineering is used to condition them into the mightiest warriors in the galaxy, immune to fear and sights that would destroy the sanity of lesser mortals. The Grey Knights are the unflinching hammer with which the Ordo Malleus smites the forces of Chaos.
Grey Knight Strike Squads often form the vanguard of an assault. They are often tasked with the capture of vital locations and key objectives, deploying by fixed teleporter to ensure a swift seizure of isolated or inaccessible locations.
Grey Knight Interceptor Squads carry personal teleporters, allowing them to 'shunt' themselves through Warp space to another location on the battlefield.
Grey Knight Purifiers are considered to be utterly incorruptible, even more-so than their brethren. In battle their cleansing flame will scour the souls of enemies nearby, consuming them from the inside out. If the flames do not take their lives, the Purifiers certainly will.
Grey Knight Purgation Squads are the support units for the Grey Knights. Their skill with ranged weapons is unmatched and, in the direst of circumstances, they can use their psychic powers to fire at unseen enemies that thought they were safe behind cover.
This multi-part plastic boxed set contains 118 components, which you can assemble as a Grey Knight Strike Squad, a Grey Knight Interceptor Squad, a Grey Knight Purifier Squad or a Grey Knight Purgation Squad. There are enough parts to make five Grey Knights with Nemesis force swords and the option to build one of them as a Justicar. There are also unit upgrades including Nemesis falchions, Nemesis force halberds, a Nemesis Daemon hammer, a Nemesis warding stave, two psycannons, a psilencer and an incinerator.