Hi top dogs 360, One thing you have to keep in mind is not everyone will have the same monitor resolution as you. What looks good to you might not look so good to say someone with a resolution twice the size as what you have.
Your original image by itself is nice but at the top of your forum on my 1920px res monitor its really stretched.
A fluid full width Image can be done but its tricky and time consuming.
Hey.... as long as your happy, go with it.