I'm getting my wife ready for when I order a new computer, I drop hints a little at a time so that when I'm ready she knew it was coming.  Don't want to drop the bomb all at once.  Anyway, I'll have the computer built and my question is: Does a SSD really make that much of a difference?  I will only put Trainz on it.  If so, what size is recommended?  I will be spending close to $2000 so if you had that amount to spend what would you put into it?  Thanks.