Tap, I do hack squats (see 7/1, 7/8 and 7/15) because my gym only has one squat rack which is always being used when I go - and no one uses the hack squat.
Fuzz, thanks for the info - always good to hear what works for other folks. I just happened to stumble across the 5/3/1 stuff and wanted to give it a try for a few sessions, and since it's for adding strength/mass, I decided to couple it with some more cardio.