Don't know about the Demon (maybe a bit fast if you're planning night fishing?) but don't bother trying to go for one of the Le Cies that Glasgow Angling Centre have on sale!! I tried, with exactly the same thing as you in mind and they were next to useless when I called them. I bought rs2ford's Loomis GLX instead. Far better to deal with!
I would recommend the Scandinavian makers (especially Loop as I have most experience of them) as they seem to do this type of rod very well IMHO. I would have gone for a Loop myself I just couldn't resist a medium-fast Loomis when I saw it