^^ Needles summed it up best.
Do SS lines and Bleed (Flush completely) with a higher quality fluid, it makes a very big difference. Motul RBF600 is really good, but is a bit more hygroscopic (absorbs moisture fast) than lower temp brake fluid, so I would suggest bleeding at least 2x/year. If you Auto-X or road race, bleed before and after each event. The good thing about Motul RBF600 is that it should be available locally to you, most every import motorcycle dealer carries it! I usually find it for $15-20 each 500ml bottle, don't leave the cap off the bottle for a long time at all, and seal it up good. Another quality fluid is Valvoline SynPower Brake fluid it is about 1/5 the price, better than most over-the-counter fluids but not AS good as the Motul. If you do get SS braided lines, get a quality set that is DOT approved, there are low quality ones out there without the certification. Also make sure they clear and don't rub on any steering/suspension component, they could rub through the braiding and result in a line failure! You don't want that. I don't know the Brands and their applications for a Mini, but StopTech does have DOT approved lines and each line is "tagged" DOT so you can pass inspections if your state requires them.
As for rotors, just get a good quality blank like Brembos, I don't put much stock in the cross-drilled and slotted "type." For one; Cross drilling and slotting reduces mass of the rotor which helps dissipate heat generated during braking and for two; slotting wears pads faster by swiping the pad surface with the cutting edge and three; cross-drilled rotors usually form stress cracks in the rotor unless they are properly radiused. Also Brembo blanks are cheap enough to replace with every pad change.
For pads, I really like the Axxis Ultimate for a street/light Auto-X pad. They may feel weird with the first two stops when they are cold, but then they feel normal and good. The drawback to them is the dusting, they dust alot, but the dust is easily cleaned up. Depending how often you wash your car, it may be a non-issue as I know they are many people on here that wash every other day. As for Hawk HPS, I have never tried them, but I have heard ALOT of good things.
Hope this helps. I have first hand experience and knowledge from everything I had said.
