800x600 is fine, 3 times the size of a typical screen just slows down page load time, please feel free to post hires links.
http://www.militaryphotos.net/forums/showpost.php?p=4470658&postcount=11737 is 800x600 adequate or shall I post them even smaller?
http://www.militaryphotos.net/forums/showpost.php?p=4470658&postcount=11737 The images in this post are way too big, please fre size them, feel free to post hi res links.
