Aravindan,
as you would know, there are different kind of Stereo Amplifiers and speakers with different specs and audio output (good soundstage, imaging etc)
They are in various price range from various brand/same brand.
First, decide your budget, so that you can allocate how much you can spend on Amp and Speakers and the place you dedicate to listen also plays a role
As of Amps - Marantz, Audiolab, Cambridge, Denon, Nad, Yamaha etc
Speakers, - BookShelf / Floorstanding - Elac, Klipsh, Wharfedale, SVS, Polk, Kef, B@W etc
So, decide your budget and based on that select the components.
Wish you good luck for your sweet music listening !!!!