My latest BA list, enjoy.
Commander Dante: 225 pts (an absolute MUST have for this list because of his precision strike rule)
Librarian w/ jump pack: 125 pts (Unleash Rage, and Blood Lance/Might of Heroes)
Chaplain w/ jump pack: 125 pts
Sanguinary Priest w/ jump pack, power sword: 90 pts
Sanguinary Guard w/ chapter banner: 230 pts
Assault Squad w/ 10 men, 2 meltaguns, powerfist, infernus pistol: 250 pts
Vanguard Veterans w/ 10 men, 9 lightning claws, sarge lightning claw (free!), jump packs: 450 pts
Vanguard Veterans w/ 5 men, jump packs, x5 storm shields, x3 power fists, sarge power fist (15 pt discount), meltabomb (x1): 355 pts
And thats the army. 34 marines, no transports.
Unit formation: Dante, Chaplain, and Priest go with the Guard. (I WOULD put the priest and/or chaplain with the claw vets, but that takes away heroic intervention) The Libby goes with the Assault Squad.
Here's how it works: Get your reserves in, re-rolling for them if you need to, and place them near your enemy. Place your SS/PF Vets first, placing them directly on top of a vehicle, meaning that if you scatter, you can still assault. Of course, if you get a direct hit, you can always shift your unit two inches as allowed by deep strike rules. This garuntees an assault on the first turn you come in, which is key. Second, place your other Vets group in a similar way. Either place them next to a group of soldiers that MUST die, or wait to kill whatever comes out of the vehicle (if its a transport). Either way, keep them fairly close to your other vets squad. Next, place your assault squad in a position that the libby can blood lance, and the meltas can get down and dirty. (also try and keep this close) Finally, place Dante's unit onto the board. As you may have noticed, this unit carries all the buffs. With your army (hopefully) fairly close together, this means that you will hopefully extend these buffs to most, if not all, of your army.
Comments: This army truly depends on getting a large portion of your reserves into the game at the same time. This is going to be the most dangerous time for your army, as things might not work out as well as you had hoped in this respect. Obviously, you will need to compensate when not all your units come in at the same time, but, take consolation in the knowledge that this is army is a close combat monster. Pop those transports any way you can, and then let the claw Vets multi-assault the juicy units inside. This army really does need to fear the template weapon however, so, make sure you eliminate as many of those as possible when you first come in.