i believe plasma @ lcd hav its own advantage..it depends on ur preferrence.as 4 me,ive owned both plasma & lcd.where as my lcd wil be used 4 gaming session and my plasma 4 watching movies.as plasma wil do greatly 4 movies watching due to its black production,and also good 4 SD gaming console such as PS2 & Wii.while HD gaming console (PS3 & Xbox) wil do good wif lcd.
For me,i wil go for sharp as i dont hav much faith in LG brand from my past xperience with this brand (sory LG owner..juz my 2cent).