I would gladly pay 1 RHD (even more so of the outsider type) to nab a +8 to Str, +4 to Con, -2 to Dex, +2 to NA and thusly +4 to Grapple. This monster has impressive stats and immunities and a nasty rider on grapples. Going Bear Totem Barbarian to nab Improved Grab seems excellent. The one drawback of these guys is the inability to verbally communicate...but Drow Sign Language is available to anyone for at most 2 skill points, and is anyway useful for the whole party.
I'll give LA+1 to these dudes, and I'm honestly considering LA+2 (looking at a dedicated grappling build). The awesome stat modifiers and immunites make up for the lack of class features to me.