What C++ compiler do you use and which you think is the best?

[nuzzle]

It's important to separate the compiler from the IDE.

The IDE is responsible for things like syntax checking and debugging, and the compiler is responsible for laying down code. I'm pretty sure even VS sports a separate syntax checker as of 2010.

One cannot compare compilers by comparing the syntax checking and debugging capabilities of different IDE's. To compare compilers one should compare the quality of the code they emit and how C++ standard compliant they are (and maybe how fast they are but that's of secondary importance in my view).