Best is up to the person using it
However, new to market would the Tekton ratcheting wrenches.
I picked up a set of their standard length metric double box end flex ratcheting wrenches. I like them. They do come in a red wrench rack which is the wrong color for metric wrenches but, maybe Tekton will figure that out one day
I rarely ever use the open end on a flex head combination ratcheting wrench so, these are almost perfect for me. They have nice 6 point ratcheting boxed ends with off corner engagement, crisp 72 tooth action, nice chrome, & balance. The only downside to these wrenches is that on the smaller sizes like 8 & 10mm, the boxed end wall seem a little thick but, that might be my eyes just playing tricks on me. What I like about these wrenches is that they aren't too long. Many models of ratcheting boxed end wrenches are in the extra long length category. There's nothing wrong with that but, sometimes those wrenches are too long to use in some situations. These Tekton standard length flex head box end wrenches are the perfect length for most applications.
Now if Tekton was to make this length wrench with a fixed box end on one end and a fine tooth ratcheting boxed end on the other end, they would have the perfect ratcheting wrench in my opinion.

Yes, other brands make this wrench in extra long versions, and I own most versions but,
no one makes a standard length version
http://www.tekton.com/Ratcheting_Wrenches