Image hosting using Apache2 or Lighttpd

[billuk]

I have a forum and I am about to offer an image upload facility.

I have two options;

Option A - Serve the images from Apache2 alongside the rest of the site.

Option B - Install lighttpd (or similar), create a subdomain on a different IP. Run the lighttpd and apache on the same server (different IPs), with the lighttpd serving images and apache2 serving the rest.

Would any benefits from serving images via lighttpd be lost by having two webservers on the same machine.

Is it worth the hassle of installing them side by side?

Thanks in advance!