J.R.
When I was looking at eliptical machines several years ago, I spoke with a trainer at our gym. The MOST important element for me personally was to find one where the width between the feet pedals is NARROW, mainly b/c I have narrow hips. The wider versions gave me lower back aches and other physical symptoms. When i switched to the narrow models, all symptoms disappeared.
Just wanted to throw that consideration about your body type/build before you purchase.