The quest reward is green rarity. Scorch has a low chance to drop an Orange (the Hellfire SMG) as a result of you killing him. This is separate from the quest reward. --- You can take my Karma, but you'll never take......MY FREEDOM!
I honestly wouldnt worry bout it to much cus if your looking for a certain item or weapon someone one on this board including myself will dupe or trade it to you. But if your looking to do it without outside help then yes wait till the end of them main story for everything to scale. But for me i got most the the cool quest rewards i wanted scaled to 50 on my first character so ill just do the sidequests on my other Vault hunters even tho there not 50. --- I'm the backwards man the backwards man i can walk backwards as fast as you can! Currently Playing: Borderlands 2, Skyrim, Halo 4, Dead Space1+2