If you can (and if you haven't already) you might want to think about some flat response, near-field monitors (speakers). Even really cheap one represent a huge bang for your buck and will give you a huge improvement over computer-speakers or even expensive headphones.
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