Well you still haven't said if you were going with 32-bit or 64-bit; 32-bit can probably run old 16-bit windows games just by setting the compatibility mode and 32-bit games will likely work in compatibility mode in 32-bit & in 64-bit. And you didn't say if they were DOS games, which as I mentioned would run with DOSBox.
So if you are going 64-bit and you have old 16-bit windows games (like ski.exe) then yes, I would pay the extra $30 or so and go Professional just to use the free download of Virtual PC - XP mode.
You have marked this solved so hopefully I was clear.