On those all too infrequent trips to the gym, I like the Precor ellipticals there. But way too pricey for home use, unless you're super-serious.
My triathalon-doing buddy bought an elliptical for his home about a year ago. He did a ton of research and ended up getting a
Sole E55 machine. Bought it based on the positive
reviews he read online and from a few other triathalon-doing buddies. He has been very happy with it. We were just talking about it a few weeks ago, and he says that it's holding up and works as well as the Precor's at the gym. So from one guy, highly recommended.
I know that IF I ever get serious enough about working out and wanted a home elliptical, I'd try to spring for one of these.