Join Date: Feb 2007
Location: On an intergalactic cruise, in my office
Power Pures/BT-003RS/S20s/Q2s are more than enough for an intermediate pace, and will indeed take you easily into expert. There will be a difference, but you probably won't be fast enough to feel it.
As far as compound, soft is generally a waste for track days. It all depends on track temperature as well.
2005 ZX-10R Street and Track Whore