You have received rational advice above.
I belong to the camp that believes Power Cords (PC) & Interconnect Cables (ICs) DO make a difference to the sonic signature of the system..... assuming the replay system (which includes the room), resolves reasonably well. PC, IC & Speaker cables will not correct for distortion or excessively deviant sound... they will typically change the colouration, improve resolution, change dynamics etc.
A Change in PC or ICs as early in the chain as possible, makes the most difference to my ears...
Hence a Change of The Power Cord on the CD player will generally have a greater impact than on an integrated amplifier. (Ditto for ICs)
I also believe that most brands have their own unique "house sound." Cables can make the sound more "Forward", Dynamic, Laid Back, Improved Bass (quantity & bass resolution), improve resolution, provide a darker / blacker background, etc
Moving up in the Hierarchy of a Cable Brand will offer better Resolution, Dynamics etc, and the overall performance will have better finesse.
I believe spending 10% of your budget on Cables (selected wisely) can give you a 15% to 20% improvement in the system sound.
I invite you to visit a good Hi Fi Dealer in Delhi, and take a listen. The Dealer that sold you the Tanoys would be a good starting place.
PCs & ICs should only be purchased after a home audition, and after you are clear in your mind, in which direction you want to nudge your system sound.
If you do not hear a difference, its OK, you are blessed, and need not spend money on PCs & ICs!
An audiophile's pursuit is a journey, so don't expect to achieve nirvana instant (or a permanent) nirvana
I do not intend to provoke YET ANOTHER endless debate on Cables, hence will not respond to posts that I feel are headed in that direction.
To each their own.