I believe you need to go all good or all evil to get the extra loot from Bellegar. If you mix your choices you just get the chest with a random legendary item in it.
After going through and choosing all good, I wasn't particularly impressed with the quality of the reward, so I reloaded and made more practical choices (don't be evil... but don't give up any stat points either).
The opponents in there have a chance of dropping legendary quality equipment, so if you save before each group, you could reload until you get something.
