Please advise and recommend me, the pros & most importantly the cons of the following. I'm confused & spoilt for choice..

49" Sony x7500f (rm 2988)
49" Toshiba u7750 (rm 2411)
55" Sony x7000e (rm 2685)
58" Samsung nu7103 (rm 2959)
55" LG uk6320 (rm 2888)
50" Sharp ua6800x (rm 2829)