Ok from my experience servicing a few electric reels recently, Daiwa and Shimano Electric reels would be the more reliable brands I see, however they do require regular servicing, stay way from the bottom end cheap chinese stuff, however the Kaigen 1000 reels I see are pretty good when used correctly. Please remember they are an electric assist reel and NOT a winch, they are prone to overheating when used hard in Deep water over long periods, so give them a break by hand cranking occasionally if hauling up 3 big blue nose at a time. 

Hope this helps in your decision making process, cheers swordfishsteve