Recommend a sixth exercise

[Scary_Tiger]

Right now I'm doing 5x5 workouts of 3 exercises every other day but I want a new exercise for Day 2. Obviously I'd like to hit any major muscles I'm missing, and an explanation of why it would fit in well would be great. [img]/images/graemlins/tongue.gif[/img]

Day 1

Squat 5x5
Bench Press 5x5
Standing Military Press 5x5

Day 2

Deadlift 5x5
Pullups 5x5
??? 5x5

The next Day 2 is Sunday.