Hi Friend. Since you are looking for a good stereo amp, I would recommend you not to buy a integrated stereo amp. You have good speakers and also planning to upgrade to some good speakers. Instead of a integrated one buy a solid power amp and a streamer and a good dac seperate. This will be good for long term and will sound more musical and can be tweeked as per your requirements. Also brands like Denon have good after sales services in India.
My suggestions around your budget will be
1.
Parasound NewClassic 2125 v.2
2.
Rotel RB 1552 MkII