I have tried Super Brights as well and didn't dig them. They're not as bright as you think and their 'core' sound faded quite quickly IME. They are also really low tension for their gauge. I think Sunbeams are similar-ish. Sunbeams are definitely more brighter out the packet.
Pure Blues to me are like Sunbeams but not quite as bright fresh on - they do retain their sound very well though from my 18 months using them but they have really nice mids that the Sunbeams or Super Brights can't match IMO. They are a nice tension as well, not as low as the Dunlops but still very playable.