samsung or panasonic. either one. samsung will have better color out of the box. they're more comparable after a calibration. the panasonic will have better detail with darks. panasonic is less likely to have a nagging issue like buzzing or more heat than usual. in a couple months i'm going to get a panasonic 50g10, but the samsung 50b 550/650's being a couple hundred bucks cheaper in my area are very enticing. i wouldn't regret getting a samsung if i had to save some money.
btw, the samsung will probably offer more wow straight out the box. but if you get a g10 or v10 panasonic, they both have thx mode. thx mode will offer the most accurate depiction of x source material, but your wife might not appreciate that. especially since alot of peeps think it's too dim.
Home theater gladly not designed by ereed or bgtighe23. 65" JS9500, Marantz 7702MKII, Parasound Halo A31, ClassDaudio SDS470 4ch, RBH R56, 4xRBH R55, 2x RBH R5, Hsu VTF 2 MK 3 and VTF 3 for subwoofage, OnStage MS7701B mic stand with boom for improved Audussey XT32 calibrations. Listening space happily treated with 1" OC 703 rigid fiberglass. OPPO 203 or 205 soon.