The best-rated Keurig coffee maker is the K40 Elite, according to both Walmart.com and Target.com. On Amazon.com, the best-rated model is the Keurig K45 Elite, as of 2015.
The second and third most popular Keurig coffee makers at both Amazon and Target are the Keurig 2.0 K300 brewing system and the Keurig 2.0 K500 brewing system. On Amazon.com, the second best-rated Keurig model is the K145 OfficePRO brewing system that comes with a bonus K-Cup portion trial pack.
Other well-rated Keurig machines a include the Keurig 2.0 K400 brewing system. Amazon shoppers also prefer the Keurig B40 New Elite single-cup coffee brewer.