For 24" you can go for dell (the one you have mentioned) else, you can look into these:
1) BENQ FP241W 24"(it's one of the best) *www.benq.com/products/LCD/?product=1010 but really had to find and is most probably in the end of its product cycle, as per benq.
2) LG L246WP 24" *www.in.lge.com/Product/Products-Details.aspx?cat=171&pid=3995&subcat=LCD
3)LG L226WTQ 22" it is said to be the best *www.in.lge.com/Product/Products-Details.aspx?cat=171&pid=4779&subcat=LCD , only other competition is from
4) Samsung 226W (try to get the "S" panel) *www.samsung.com/in/consumer/detail...ubtype=tftlcdmonitors&model_cd=LS22MEWSFV/XTP
Even I am looking for a 24" lcd but didn't find a single piece in kolkata other than AOC 416V 24" *www.aocmonitor.co.in/416v.html (priced at 20.5k + tax)