I’ve got an orange p7 mountain bike. I’m looking to upgrade the group set on it. I’m thinking Shimano Deore XT M8100 MTB 1x12 Speed Shifter RD Cassette Chain Groupset (or maybe the 2x12 speed shifter). I’m also thinking about having matching quality brakes. But I’m open to advise and alternatives. Can you give a price, please?