I am also looking for some budget 50 inch fro my Parents. There are a lot , MI, TCL, NOKIA, TOSHIBA, HISENSE. KODAK.
All of them have their PROS and CONS. Some has more frequent DSE issues, Some are service related etc . You have to choose on what part you can compromise.
As of now i thought to have look on SHARP Tvs from Reliance Digital. Among all of them i have preference on the SHARP models . Even though it is made by HISENSE ; but the PANEL DSE might be less than TOSHIBA/HISENSE models.