Nautilus treadmills or alternatives

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Does anyone have experience of these? We’re looking to spend £1000 or so and had had a couple of NordicTrack ones at the top of our list, but a sales guy at Fitness Superstore reckons that Nautilus machines are better quality however that could be due to sales incentives etc...

Are there any other brands we should consider? We’re a little restricted by the length so a used machine from a gym wouldn’t work for us.