how far away were you standing when you viewed the 4k screen? my screen is definitely the weak link now, and while i'm not in a position to upgrade right now, i'd like to have a running plan so i'll be able to order quickly when the time comes. funny how i never noticed screen texture with my uber cheap, bundled in white screen. only noticed it from my front row(about 11-12feet) with the grey screen and 720p projector, and now it's clear as day from even my back row(17-18feet) with the 1080p projector. and here i thought i just wasn't sensitive to screen texture issues...
Displays: Samsung PN64F8500/JVC X35
AVR: Pioneer VSX-1130K, 7.1/5.1.2 audio
Sources: HTPC(Enby), PS3, XBOX360, Wii
Control: Harmony One