@harshs23
For starters Fiio E10 has good reviews, and its better specd than E07K as you are not looking for portability.
@Rupam Standalone DAC will surely be better than on-board dac on laptop, but you will need a DAC without amp or one with a line-out if you want to drive an external amp. But all this will show substantial difference with high bit-rate lossless audio formats such as flac/alac/wav.