what are the best cpap machines?
['Best portable and convenient: Philips Respironics DreamStation Go. ... ', 'Best premium-grade: ResMed AirSense 10 Autoset. ... ', 'Best affordable: ResMed AirStart 10 CPAP with HumidAir. ... ', 'Best cost-friendly: DeVilbiss IntelliPAP Auto CPAP Machine.']