Thanks guys

I've been working on a hormagaunt as the basic barb (navydawg's Hydralisk is a great Ravener for the advanced barb)
Librarian is planned, not sure when at this stage. I'm making finishing the Space Marines, Guard and Chaos my priorities tho so I'll get to it sooner rather than later (i hope)
Also, looking at the Grey Knights, their unit line currently looks like this:
Starting- Stormtrooper
Infantry- Grey Knight
Tactics- Psycannon
Mobility-
None
Mobile Infantry- Chimera
Support- Incinerator
Assault Infantry- Death Cult Assassin
Fast Attack- Grey Knight Rhino
Walkers- Grey Knight Dreadnought
Elite Infantry- Grey Knight Terminator
Stealth- Vindicare Assassin
Heavy Support- Dread Knight
Flight- Vulture
Siege- Orbital Bombardment
Field Artillery-
None
Special Weapons- Drop Pod
Heroes- Daemon Hunter
AA - Hyperios
Super Heavy- Landraider
Champion- Inquisitor
They have a few gaps that I'd like to fill, so I'm proposing:
Starting- Stormtrooper
Infantry-
Acolyte added (Grey Knight moved to Tactics)
Tactics-
Grey Knight (Psycannon moved to Support)
Mobility-
Interceptor added (Interceptors have personal teleporters to 'shunt' themselves around)
Mobile Infantry- Chimera
Support-
Psycannon (Incinerator moved to Promethium Refinement)
Promethium Refinement-
Incinerator
Assault Infantry-
Purifier (Death Cult Assassin removed)
Fast Attack- Grey Knight Rhino
Walkers- Grey Knight Dreadnought
Elite Infantry- Grey Knight Terminator
Stealth- Vindicare Assassin
Heavy Support-
Paladin (technically not a HS choice but its basically a badass GK Termie so it could fit)
Flight- Vulture
Siege- Orbital Bombardment
Field Artillery-
Dread Knight
Special Weapons- Drop Pod
Heroes- Daemon Hunter
AA - Hyperios
Super Heavy- Landraider
Champion- Inquisitor
They have one of the least populated unit lists at the moment, i'd be nice to get some more stuff in.