I am an advocate of both but not during the same workout.
I lift weights either twice a week (during marathon training mode) or 3 times a week (non-training). I follow the BFL weight lifting method. However my only "cardio" on these days is stretching and a 5 minute walk on the treadmill.
My cardio workouts are either 5 days a week marathon mode or 4 days a week non-marathon mode.
I never mix the two on the same day.