75" TV is a different league bro, RM6K not gonna get you the premium brands like Samsung, Sony or LG now, maybe after price drop by year end or early next year. However, if your buying windows is immediate and budget is really your constraint, then lookup Sharp 4TC70AL1X 70" 4K UHD Android TV. Otherwise topup RM1K or so, you can get the premium brand ones. Few weeks ago, ESH had the Samsung 75NU8000 on offer for RM7K. Call them out, maybe they still have stock and you'll be lucky.   

Lastly, the SONY 70" 4K HDR Android LED TV KD-70X8300F is now just a little under RM7K if you want to consider.  Good luck.

See rtings review and testing here --> Rtings Samsung NU7100

Personally, if I were to go for 75 inch, I would go for the 75NU8000, reviews and testing  also better, at RM7K from ESH if still available is a steal compare to RM6.4K for the NU7100.