Loose foot. So much easier to see how much draft you've got.
The drawback to a loose foot is that you add induced drag due to the endplate effect as the loose foot allows airflow from high pressure to low pressure side of the sail. Hahahaha, not gonna be a big deal on our non-race boats! However, the way a race boat would address it is to have a shelf sewn into the bottom of the loose foot sail. This acts very much like the winglet you see on the tip of airliner wings.
I would also recommend draft stripes, so you can see the location of max draft up the sail. In higher winds, the draft of the sail is pushed aft by the force of the wind, inducing more heeling. This is why luff tension is important, and often controlled by a Cunningham. The Cunningham allows you to set the halyard to max sail hoist, yet still pull down and increase luff tension to basically pull the point of max draft forward in higher winds.
Like Greg, I also added 2:1 purchase to my outhaul. I measured about 10% of foot length to be my maximum amount of draft, and marked that on my boom to a reference point on my purchase block. Eventually I will get around to adding an adhesive scale (just a ruler, basically) because I keep pretending it's a race boat or something...
