Both ... but I bought a gym quality one at Fitness in Motion about 5 years ago to use when I can't go (I have 2 kids, so it's not always an option). I paid about $2400 for mine, but they have them in all price ranges. I'd recommend if you're going to spend a good amount of money on one, to get one with the cross-training bars so you can get the most workout for your money.
I think the brand of mine is Vision Fitness and the only thing I've had to do to it is tighten the screws on the cross bars, and it gets heavy use ... but Precor is very good, obviously. Also try a recycled sports shop, they sell barely-used preowned ones at a pretty good price.
I've got one like this, only a little older:
http://www.ellipticaltrainers.com/mo...sion_X6600.htm