I just recently started using our Hammer Strength pullover and lateral raise machines routinely.
While not a fan of most machines, I will admit that a small few are quite effective and maybe even superior to their free weight counterparts in regards to aesthetics.
Equipment such as the ones above, as well as the pec-deck (elbow pad version) can help you maximize work involvement of the target muscle due to the point of tension placement.
I'm a member of LA Fitness and it seems that they carry the pullovers in most of their gyms I've been to. One even has both the standing and seated calf raise machine.