bermuda and tunze are the best, better than the deltec. Another decent hob is the turboflotor, but for the price the bermuda is better. Aquamedic is going to have a new HOB the turboflotor blue, looks good.
A decent cheap HOB is the D&D marine typhoon. Another cheap one that looks decent is the odyssea ps160, I have one in a sump and it works great, but never tried it HOB.