I ride a dual disc bike and a bike with hs33's on and i would go for magura over discs any day I think think a decent set of maguras is cheaper than a decent set of discs and plus most frames come with magura mounts on the rear and as far as i know thers not very many frames fro a decent price with rear disc mounts, yeah its all good to have dual disc but over all maguras are cheaper to maintain and to buy brand new, if you look on tartys theres loads of replacement parts or maguras and not that much on the disc section , what does that tell you.... maguras are better. so over all yeah i would go for hs33's . jake