1,500 is tough for to fit an LR in and still be effective in this age of melta-spam. In my pure deathwing 1750 list, I somtimes run with 2 Land Raider crusaders.
Now, if you are playing a more mixed force of an entire DA army with 1 Deathwing assualt squad in a LRC, than that could work, but it's not my preference.
I think the most competitive DA armies will be Deathwing Troops with Ravenwing support at lower levels and Deathwing and Ravenwing (both as troops) at higher point levels.
Rough 1,500 list
4 x Deathwing squads, each with a combination of TH/SS, CML, and Storm bolters (Troops)
2 x 3-man bike squad with 1 Melta
1 x 3-man bike squad with 2 melta.
20 scoring termys and 9 bikes (with teleport homers) at 1,500. not to shabby, but takes a good general to win. (put an apothecary in one squad)
You can swith around the Ravenwing support dropping bikes and putting in speeders if that is your preference.