Hey,
I own elliptical trainer and I absolutely love it - wouldn't replace it for anything. I have tried everything - stepper, treadmill, bike, but elliptical trainer is absolutely the best!!! My advice is, don't save your money. Before I bought mine, I consulted a fitness trainer, and he said, that cheap ones are a total waste of money. And I agree. I went to the store, tried out cheap (120$) and afterwards I tried out a 600$ one, and the difference was huge!!
I am glad I bought the 600$ one, and I think it payed off - it was really worth every cent. When you work out on a quality fitness equipment, you can feel it!
(I also bought very cheap equipment, and it ended up in a basement)