I'd probably throw lunges in there too. Use dumbbells, or put are barbell on your shoulders and walk across the gym. Could give stiff leg deadlifts a go for your hams and glutes.
Do you every superset those leg exercises? ie leg press/leg ext. Every 3 weeks or so I do heavy 45deg leg press (12 reps) followed by ultra slow, ultra strict leg ext with a moderate weight (usually get about 15-20 reps)...this really destroys my quads and Im feelin it for 3 days after
