@pratik I like the TWSBI Diamond 580 AL if it's in your price range. F nib feels great on it, also they are absolutely beautiful to look at if you enjoy looking at ink and aluminum mechanics. My Eco with F nib has a bit of a "scratchy" writing feel; if you wanna go with lower price range than the Diamond, I do really suggest maybe another Lamy Al-Star in a finer nib and different color XD