Reasons ? And which better monitors you're pointing to?
Hi Sir ,
Black levels ! Not so good , white or day time scenes in movies will blow your mind but blacks , terrible to say the least .
Equivalent Benq and Samsung monitors are much better .
Check any review , they would say the same . I would personally avoid these monitors .
Rest its a personal opinion , some people are fine with washed out blacks , but my eye cannot help but notice it .
It might be because am used to my IPS top of the line Sony TV . People might say am dumb comparing it with something with over 10 times its value .
Am not comparing really , but anyone used to viewing a lot of movies and different displays will tell you about the blacks on these monitors . There should be a certain balance .
See some movie like the Pirates of the Carribbean , you wont like it at all !! .
Now someone would jump and say am talking rubbish , I have that monitor and the blacks are super . Its a personal opinion in the end , I have seen better blacks in 5-6k Samsung monitors of a friend .
I always recommend Samsung monitors not only because I feel they are balanced in color reproduction and have nice calibration , but they generally also last longer .
Dell and Benq might have that great service compared to Samsung , but Samsung's are somehow reliable , I have used one myself . Have at friends place .
Got a friend with Benq also , even his went kaput but benq has good service. But Samsung I have hardly seen conking off ! .
Some say we gotta compromise , black levels are not a low end monitor's ball game , that true ! . But for the same prices , any benq or Samsung ( I recommend ) offer somewhat better blacks . comparative basis

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I have used all 3 so I can surely be confident of what I am saying . Infact I ve even used Acer and viewsonic and Intex ( terrible ) .
I would go with an Samsung monitor anyday . If I want IPS , the dell ultrasharp series but not having an HDMI is a serious bummer but heard its quality shadows it all .
Benq 24 inch LCD - G2420HD Monitor: Flipkart.com
Samsung 24 inch LED - S24B370H Monitor: Flipkart.com
Dont go on the pricing on flipkart , street pricing will definitely be lower . There are many monitors out there then the ST series ! . People might disagree , I dont mind its a democracy , but am only telling what my eyes point out .
Cheers , hope this wasnt boring .