You can use a pedal, it is all about what you like. I think you might be onto a winner with a tube screamer providing you are not after a really heavy sound. I have a Boss OD-20 which is excellent as it has a huge range of sounds.
My instructors page and www.studiotrax.net for all things recording.
my toons Brought to you by Dr BadGAS
my toons Brought to you by Dr BadGAS