All the android units for grande are chinese. Although they work fine but the sound qualty is rubbish.
If you want something branded you can look into pioneer. They start from 40k +
Some of pioneer head units have android auto feature so if you connect android fone many apps work on the head unit. For fitting the pioneer headunit in your grande you will need to buy a fascia headunit kit. That will cost you around 4k
Your current headunit will go for 30-32k max. You can try selling on pakwheels.
My head unit is pioneer 8750bt with following specs
2 usb ports
Apple car play
Plays flac (free lossless audio codec)directly through usb
Time alignment function
And many more. Its one of high end pioneer head unit. Costs round about 60k