I can attest that the IDA Disassembler is a very fine product. I happen to own this package and under the rare case where I have to do a disassembly it makes the job a lot easier than the "normal" type of disassembler.

The package has the ability to support disassembly for a wide range or processor instruction sets. It also supports an interactive user interface to allow you to modify, control, and annotate the disassembly process on the fly. You can even enter symbol names, comments and function headers.

Michael Karas