ok, in my experience this would be a good setup: Levers....Avid SD7 anyday, most comfy, light and very handy speed dial adjustment. Arms....Not so important, Adiv SD7 again good, otherwise shimano work pretty well too. Pads....with a grind DEFFO TNN LGV pads! work well on smooth rims too. Booster....DEFFO worth having, not really to make the brake stiffer, but it will double the holding power of the brake. there are not many out there at the mo, see if you can find a Salsa or carbon shimano booster on ebay. Cables....REALLY important I think! I now would only ever use shimano SP5 cable, it doesn't compress, can be cut to length and is very smooth.