Why nobody can equal the Pioneer Elite KURO plasmas yet?

[Nicolidakies]

I'm looking at a used LX5090 this week-end. It still has a full year of warranty left so that's a major plus.I've heard a lot about ''optimum'' mode being bad for overall pq and lifespan of these tv's. Is this true? And if so. Can I just look in the service menu if the contrast has been boosted too much? On a tv with approx 2500-3000 viewing hours. Would it be recommended to let it be if the previous owner always watched it this way,or is it nog that bad as people say?The guy himself doesn't look like a ht freak to me so I don't think he fiddled with the controls too much. Just wanna make sure. I'll be able to testplay the tv. Any other things I need to take a look at?He's asking 1800€ (2000 Us Dollars) for the Kuro with full year premium warranty,original sidespeakers and original wall mounting. Seems like a nice deal?Thanks everyone.