My quads grow easily too, so I don't do alot for them. This weeks leg work out went as follows.
Cybex Leg Press: (I friggin love this machine, it puts absolutely no stress on my knees) 3 sets. Basically its a warm up to get my legs ready to squat.
Squat: 135X12, 225X12, 275X8, 315X4, 335X2
Stiff leg deads: 185X10, 225X8, 275X6, 225X8
Leg curls: 2-3 sets, basically to get a nice pump in the hams, and get my calves ready and warmed up.
Seated calf raises: 5 sets with as much god damn weight I can handle for 15-20 reps.
Standing calf raises: Same methodolgy as above.
Finally, that abductor machine you see all the chicks use. The one were you bring your legs together. I did this exercise once for the hell of it. My inner thighs were sore for days. So I figured they must not be getting enough stimulation from squats, so I do the machine now.