Using my DPS calculator:
https://www.project1999.com/forums/s...0&postcount=41
A level 60 Warrior with 255 STR and 100% Haste is doing roughly 67 DPS with HoH mainhand and Blade of Carnage offhand against a trash mob around level 60.
A level 60 Warrior with the same stats against the same trash mob is doing 66 DPS with Reaver.
In the low 50s HoH and BoC will out DPS Reaver because the 2H damage bonus is lower. HoH and BoC is like 42 DPS vs Reaver's 38 DPS for a level 50 Warrior with 255 STR and 100% Haste fighting a mob around level 50.
All that being said, Reaver only costs around 5k, and HoH + BoC is like 160k total. If you are rich and have nothing to spend money on, HoH will serve you well DPS wise until you get no drop raid weapons. If you aren't rich, HoH isn't worth it.