Foxy Lady - Cool animation possibility and something similar to the pole dancers on Sopranos ?
All along the watchtower - Have two large ramps with a watchtower in the middle. Ramp mode ?
Purple Haze - As Gav said - just the thought of the playfield going all purple for a mode would be awesome.
Spanish Castle Magic - Lead break during "Castle" mode MM style !

Star Spangled Banner for Wizard Mode or a High score !