As I'm sure you know, make sure you have a quality long level to use. A slight error in making it level can show up pretty easily once you've noticed it.
I have a tilt only mount and am very happy. I was very limited to what would work since I have a Pioneer (60" Elite Pro-150FD) and the mount holes are so wide that most mounts out there won't work. No monoprice mount would work. I got a Peerless mount and it has done well.