Okay, here's a Blood Angels Blitzkrieg list for 1750 points.
HQ
Librarian, Epistolary- 150
Troops
Assault Squad, melta, power maul, las/plas razorback w/dozer- 180
Assault Squad, melta, power maul, las/plas razorback w/dozer- 180
Assault Squad, melta, power maul, las/plas razorback w/dozer- 180
Assault Squad, melta, power maul, las/plas razorback w/dozer- 180
Fast Attack
Ball Predator, Heavy Bolters, dozer- 150
Ball Predator, Heavy Bolters, dozer- 150
Ball Predator, Heavy Bolters, dozer- 150
Heavy Support
Predator, lascannon sponsons, dozer- 140
Predator, lascannon sponsons, dozer- 140
Predator, lascannon sponsons, dozer- 140
And a searchlight for all.
This list allows very high force concentration. What you do is you set your razorbacks up like a box in the back, with your wedge of regular predators in front of them, giving them cover. Your Baals scout forwards into position to cover your flanks or achieve more penetration. One problem this list has is limited infantry killing potential when in cover. Solutions include switching to assault cannons or heavy flamers on the razorbacks, flamestorm cannons on the baals.