i've heard tons of problems with the mx1000 as it is not a completed project, the ones you guys have are beta mice. a MS intellimouse 4.0 came with my 7700, i hate the scroll on it, but its nice and comfy. i have an mx500 that i use on my primary rig, and i also have an older ball-mouse made by Razer. i like the razer ball mouse better than the optical ones i have, it is much more accurate, but extremely uncomfortable, thats why i use the mx500 for everyday use, and sometimes the razer for heavy gaming. so because i use optical more than ball, i voted optical wired. i would never use wireless because of the lag. bleh.