Most of the newer Randall cabs are MDF unless its the the higher end thrasher/satan series. The older XL series cabs are birch, loaded with v30's and sound great. And they can be had for less than a used marshall 1960. One of the best used cab values on the market.
This. Older Legacy cabs had Greenbacks too . Some people are scared off with front loaded speaker cabs, but I can't tell that much of a difference myself. I've been rocking a Soldano 4x12 (front loaded) for a few years and have always been fond of it.