Using dbg files for debugging; best IDE for NASM

[paml27]

I am using NASM as the compiler and GoLink as the linker for Windows 64-bit NASM.  GoLink outputs a .dbg file for debugging, but it does not output a .pdb file for Windows debugging. 

My questions are: 

1.  Can I use a .dbg file for debugging a Windows program? 
2.  If not, how can I debug NASM in Windows? 
3.  Is there a best source code debugger / IDE to use for NASM? 

Thanks for any information.