Sofacykel

I don't know anything about shortening the lifespan of the screen, but I've had my external SyncMaster P2450 overclocked to 75Hz through half a year now. I just love the effect is gives, and together with the Smooth Video Project (SmoothVideo Project (SVP) - motion estimated frame interpolation with any video player and frame doubling in real-time) software, videos look stunning. Using the InterFrame script to make movies like Pacific Rim play in 75FPS makes it look glorious - We seriously need more development on the PC side of things when it comes to displaying movies. DXVA is a step in the right direction though, and it helps keeping the FPS up a lot. One thing I have noticed though, is that the brightness of the screen takes a tiny hit when OC'ed. I don't know if it only affects this particular screen, but it's something to keep in mind.

Not having luck with installing the THX suite either. The integrated sound card is just poor in this unit, don't bother with it. Buy some cheap speakers at a dollar store and they will sound better, or order a proper USB sound card. I know the ASUS Xonar U3 is pretty cheap and decent. EDIT: Had to download the suite from my official retailer (in this case, Danish brand MM-Vision), because that particular version checks BIOS for a preinstalled key or something. The activation went through with a key I've never seen before, just like my OEM version of Windows 8 where the key is hardcoded into the motherboard somewhere. Use the correct version and it should work.