I just ordered an ultrathin MXH anti glare protective film, custom cut for my display from
www.photodon.com. The MXH film offers the best transmittance for an anti glare film and is suitable for HD quality use so it shouldnt impact on image quality. I thought it was a bit expensive though, mostly due to the shipping to Ireland ($23 for shipping, total of $39.50). It probably wont arrive for 3 weeks.