Need expert help !!! LG 32ln4900 or LG 32ln5650???

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hi experts need help in choosing between these two models ?? LG 32Ln4900 or LG 32Ln5650???

LG 32ln4900 inbuid speaker is 10w
LG 32ln5650 inbuid speaker is 120w

My doubt:
10w speaker is enough or do we need 120w inbuild speaker for a 32 inch tv ??