Let me go check my starting measurements ... my arms were 15 1/2. I carried all my weight in my bottom half - my starting hip measurement was 57 inches!!!

I'm sure your arms will be lovely by the time you reach goal.
Our gym happens to call the Precors with the adjustable ramps 'ellipticals' and the LifeFitness ones with the arms that move and nonadjustable ramps 'crosstrainers'. I know lots of people call both ellipticals and I think that's correct. It's probably just the way that the people at my gym tell the two machines apart.
I think that what I call the crosstrainer is harder than the elliptical, but maybe it's because I can't adjust the ramp? When I'm on the elliptical, I tend to change the ramp every two or three minutes - keeps things interesting!

I agree that the crosstrainer isn't much of an upper body workout because your legs are really doing all the work.
But they're both really awesome cardio!