in responce the the lack of dual disk riders. it's down to choice alot of the time, the very popular frames echo controls for instance don't have the mounts, and unless you run pro2s which have disk tabs as standard, you need specific hubs which cost more, so you're unlikely to spend an extra 10-15quid on the whim that you might go for a dual disc. i already had a pro2, then simtras were on offer otherwise i don't think i'd have bothered. rear disc is made of win though. middle aged man, your best buying brand new brakes, just for the sake of confidence. a standard HS33 with some good pads (koxx pads, or ideally coust-sinks are what i always ran) on the rear, and a bb7 on the front if you can run a disk, otherwise another magura will be fine.