Braided lines are unlikely to have much effect unless your current flexi hoses are completely shot. New fluid is never a bad idea, and as for new pads I've always got along well with Mintex 1144s for fast road use.
Definitely worth replacing then. I doubt in practice you'd notice the difference between good condition OEM rubber flexies and braided lines. The difference is very marginal.
Braided lines are unlikely to have much effect unless your current flexi hoses are completely shot. New fluid is never a bad idea, and as for new pads I've always got along well with Mintex 1144s for fast road use.