One of the keys to Lightroom's success is that it combines DAM with adjustment. So when you manage raw files, you see how they look with your adjustments.
We take that for granted, but with pure DAM apps you're always saying "which one did I process as B&W?", "I wish I could see what's in that underexposed shot", and the workarounds are so-very 2006. Also, single user DAM products are thin on the ground - there's no money in them. So unless the OP needs multi-user functionality, it's hard to see why Lightroom wouldn't be the choice.