I had a Proform Cardio Stride that I paid about $350 for. It broke after two and a half months of regular use - could have been fixed I think, but I got frustrated with it and bought a Nordic Track 990 Audio Stride for $999. I like the Nordic Track a lot so far. The ProForm was small, squeaky, harder to use. So far, the Nordic Track has been fine - I've only had it for a month or so. I did notice that once DH started using it that it started making a little noise from one of the pedals. I tightened it up and the noise stopped. I did buy the four year extended warranty, so I get five years total.
Most of the ones in the sub $1500 category are defined as "light to moderate use" and have lower weight limits, so keep your eyes out for that...