What laptop have you got? MacBooks tend to have pretty decent DACs built into them to start with, but on Windows laptops the quality varies tremendously, and not necessarily in keeping with the price of the laptop either, because no matter how much your laptop cost, the sound card often gets the 'bottom feeder' share of the budget.
If you never intend to record real instruments (eg your electric guitar) you can buy a USB DAC such as the Dragonfly Black or Red, which will almost certainly better the DAC in most Windows laptops. If you need to record instruments as well, look at something like the Focusrite Scarlet range.
