I'd recommend these http://helperformance.com/mtb/ Different fittings to the the normal push fittings but I've had no problems with mine in over a year.
I've only noticed minor improvements in braking performance (I'm sure the pro's have there own views on this) but in terms of durability they are much better than the plastic hoses.
Which hoses are you going for? And what brakes?
I'd recommend these http://helperformance.com/mtb/ Different fittings to the the normal push fittings but I've had no problems with mine in over a year.
I've only noticed minor improvements in braking performance (I'm sure the pro's have there own views on this) but in terms of durability they are much better than the plastic hoses.