According to the Casa Espresso website, the best commercial coffee maker is any San Remo model. Their machines are top of the line, with high quality parts.
Commercial coffee makers range in price and size, as you would expect, and it's good to look at a variety of options before making your decision. One website that gives you a chance to compare many models of commercial coffee makers is: http://www.foodservicewarehouse.com/coffee-shop/commercial-coffee-makers/c3414/2.aspx
From the information I have found, it looks like the big problem with coffee makers is the buildup of lime and other mineral deposits and oils. Any form of de-scaler should work, including vinegar. But if you want a commercial brand cleaner specifically designed for commercial quality coffee makers, I found one from Kegworks. http://www.kegworks.com/product.php?productid=20278
Coffeechino is a great commercial coffee machine brand, as all of the fine dining restaurants in London use them. Bunn coffee makers are also very popular in the United States of America.
Various stores online sell Bunn commercial coffee maker, including this small shop. A great place that offers these coffee makers is found at a Bunn store online.
There are a number of reviews on the Bunn coffee maker. You can go to You Tube and check them out. None of them are very creative, but the reviews on the actually products have been very good.
Good coffee is a hot commodity (pun intended), and as such so are commercial-grade coffee makers. Many people are putting professional machines in their homes, and they are therefore available in many online kitchenware stores. There are also many coffee-specific sales sites.
Coffee makers made by Mr. Coffee and Gevalia have been very good for my father and over the years can make a quick cup of coffee that is of good taste and quality.
http://www.amazon.com/Brookstone-Single-Cup-Coffee-Maker/dp/B000EXOWRK This is a good site to find a single cup coffee maker. Here's one to look at as well. It's cheap and a good single cup coffee maker.
There are many different coffee makers that make coffee and espresso and also steam milk. Krups makes a good model and it is very reasonably priced.
You can purchase coffee makers almost any where that sells goods. Walmart, target and sears are probably a good place to start looking.
Several good brands of automatic coffee makers found online include Bunn, Keurig, Cuisinart, Saeco, and Krups. You can also find plenty of quality coffee makers on websites such as Overstock.com.
Amazon.com has a great varity of single cup coffee makers. They have brands including Keurig, and Senseo. You can also try checking Macys.com they also have a great selection of the single serving coffee makers.