Nephilim Jetfighter

The Nephilim Jetfighter is the Dark Angels' air superiority fighter. It is flown by the Ravenwing to allow their ground-bound battle-brothers to focus on catching Fallen Angels SHOWING THEIR DEVOTION TO THE EMPEROR without having to worry about getting attacked from the air.

The Jetfighter was added to the Dark Angels' Codex in 6th edition to help set them apart from the other Chapters of Space Marines that get their own codices. The lore justification is that the Dark Angels had the Jetfighters for longer, but only recently found the STC pattern of a superior engine that made them practical to use (though given that the Nephilim is neither Supersonic nor Fast, the previous engine must have been really bad to force the Dark Angels to keep them grounded).

Nephilim Jetfighters pack a twin-linked set of heavy bolters and six "blacksword" missiles (36" S6 AP4, named because of their black smoke trail -- which is a lot more sensible than the Blood Angels' "bloodstrike" missiles), with a choice of twin-linked lascannons or an Avenger mega bolter in the nose. Not the most difficult of choices.

This fighter is excellent proof that if the different organizations of the Imperium would learn to share and not be selfish assholes, the Long War would be Long Over by now. Seriously, the Dark Angels use this thing to mow down every enemy air craft, even Eldar (the ones who get 40-1 kill-death ratios against Lightnings). Do they share this with the Guard? Hell no! They don't even share it with other Space Marines. The jerkasses could at least give the Guard and the Navy the data for making damn blacksword missiles. Screw the Mechanicus, they have enough toys to dickslap. Besides, if they got it no one would hear of it again for a few centuries, if ever.

Dark Talon

A variant of the Nephilim, in the same way a Darkshroud is a variant of the Land Speeder (both are rocking the "Bolt a bunch of kickass masonry to the hulls" look). But unlike the Darkshroud, the Dark Talon has no idea what it wants to do with its life. It's got a Rift Cannon, two Hurricane Bolters, a Stasis Bomb, and the Hover Strike special rule, so one could be forgiven for thinking the Dark Talon is the anti-infantry to the Nephilim's anti-vehicle. But you can't drop a bomb while Hover Striking, and the Stasis Bomb is designed to debuff rather than kill so your Deathwing Knights can troll with impunity. Same goes for the Rift Cannon, to a lesser extent. Its guns are also pretty short-ranged, making it tough to hit things in Zoom mode and running the risk of your templates scattering onto your own troops.

On the tabletop

The Nephilim and Dark Talon are rather unpopular choices for a Dark Angels army, but their weaknesses have kinda been blown out of proportion. They're not bad, they're just overpriced for what they can bring. The Nephilim is great against skimmers and other light tanks, but an 180 point investment that can't kill AV14 is just too iffy for most players. And dropping your opponent's Initiative and Weapon Skill by 3 is always hilarious, doubly so when you drop a Blind test on his snipers immediately afterward, but for 160 points the Dark Talon really needs stronger guns than some hurricane bolters.