Hey @nileshsrox, I have a SilverStone CS380 and recommend it.
Comes with a backplane to simplify 8x HDD/SSD addition and removal.
There's also the CS382 but I don't know if it's available in India yet. It is limited to Micro-ATX boards, however.
I hope this helps!
A late reply, but considering your options, a quad-core NUC or a Ryzen mini PC are excellent choices. These are often available second-hand at very affordable prices, especially models with 7th-generation or older Intel chips. Alternatively, older ThinkPads or Dell Latitudes also serve well and...