So with the army all done, it's time to take some group shots.
First, a panoramic view of everything:

And a couple of detail shots:


Thanks to Man of kent, Malakai, Cuban Commissar, Markconz, GlynG, Chroma, centurion, nealhunt, mspaetauf, fredmans and Major_Gilbear for your kind and encouraging words, and to everyone else who looked at this thread. Posting stuff here was definitely a big motivator in getting the army done; I suspect I'd never have finished it otherwise.
Incidentally, I found the Dawn of War computer game really handy for trying out colour schemes before I started. It was also what gave me the idea of doing the panels on the sides of the Grav-tanks black rather than having them green like the rest of the hull: DoW did that automatically and I decided I liked the way it looked.
If anyone's interested, this army comes to 6115 points.
Using the Alaitoc v.2.4 list:
Avatar (Free)
Wraithgate (50)
Guardian Warhost (150)
3 Wraithguard (150)
Guardian Warhost (150)
3 Wraithguard (150)
Ranger Warhost (200)
8 Rangers
Ranger Warhost (200)
4 Rangers
4 Falcons (200)
Aspect Warrior Troupe (6 Dark Reapers) (225)
Autarch (75)
Exarch (25)
3 Wave Serpents (150)
Aspect Warrior Troupe (6 Dire Avengers) (225)
Exarch (25)
3 Wave Serpents (150)
Aspect Warrior Troupe (6 Striking Scorpions) (225)
Exarch (25)
3 Wave Serpents (150)
Aspect Warrior Troupe (6 Swooping Hawks) (225)
Exarch (25)
Aspect Warrior Troupe (6 Fire Dragons) (225)
Exarch (25)
6 Falcons (390)
Pathfinder Troupe (6 Pathfinders) (300)
War Walker Troupe (200)
Swords of Vaul Troupe (6 Vehicles) (300)
5 Falcons
1 Firestorm
Swords of Vaul Troupe (6 Vehicles) (300)
5 Fire Prisms (75)
1 Firestorm
Windrider Troupe (200)
Windrider Troupe (200)
Night Spinner Troupe (175)
2 Revenant Titans (650)
Nightwing Squadron (300)
Total: 6,115 points.
Absent from the photo were two more stands of Wraithguard, a Fire Prism, a Firestorm, two stands of Dire Avengers (one with an Autarch), two stands of Fire Dragons (one with an Autarch), two stands of Swooping Hawks (one with an Autarch), two stands of Striking Scorpions (one with an Autarch) and two stands of Dark Reapers. These are mostly to substitute in to allow for different options and arrangements of the various formations.
The next project will be to do some more work on my Chaos Marine force. No promises as to when I get around to that, though.