Just an update. Finally went with two Dell E2414H LCDs (~PKR20-21K/unit) with two passive DP to DVI converters (~PKR1K/unit). Tested it out and both seem to be working fine @ 1080p resolution.
Useful document from Dell on acceptable configurations: http://www.dell.com/support/article/us/en/04/SLN115893/en
With regards to upgrading to higher resolution on either monitor or expanding to three (even two seem more than enough width wise when they are placed side-by-side), I would need active DP to DVI-D/VGA adapters which are not commonly available locally.
All in all, the configuration seems to be working well for now. Thanks to all who commented and helped.