Best X86 Assembler - FASM vs NASM vs MASM?

So I'm looking to learn x86 assembly and I wanted to know which assembler is the best.

I hear FASM is the fastest assembler, NASM is buggy, and MASM is Macro$hit so it is probably slow and integrated with .net

>>43
Well yes, the real problem is the manuals. (Am I the only one who distinctly prefers AMD's manuals to Intels?  Yes, I know the mnemonics in both are the same...)

I'm guessing that having 1:1 correspondence between mnemonics and opcodes would make the assembler's job simpler, but I've not written one myself.