My preference for coffee makers is the vacuum coffee maker
http://www.zaccardis.com/bodum-santos-vacuum-coffee-maker.html which I use on the weekends.
Regarding the coffee at the office, the best method they had at my office was a machine which used a liquid coffee concentrate (looked like syrup) which automatically dispensed the "correct" amount when you pulled on the hot water dispensor. When someone new ran the cafeteria they did away with the coffee concentrate machine and started using a Bunn. They couldn't make consistent coffee with it so I started bringing in my own thermos pre-mixed with raw sugar and "pet" milk, the method they use in Puerto Rico for sugar and cream.
I don't think any one at an office could agree on the ideal cup of coffee since it is a matter of taste. Diner coffee is way too week for me, Starbucks coffee is just about right except for the price. When I was in Puerto Rico many years ago, I preferred their coffee since it wasn't as strong as European coffee and not at week as US coffee.