Using wireless infrastructure like airplay or chrome cast wont give you the same quality as possible with a wired connection.
Before investing in a new receiver, why not see what a wired connection from your laptop endpoint to the receiver sounds like?
Does your laptop have an optical output? If so, why not connect that to the receiver optical in?
Does your receiver have a USB input for its DAC? If so, why not connect the laptop via that?
Does your laptop and receiver support Hdmi? If so, why not try that for a wired connection… if not, a cheap breakout box can extract the audio signal from Hdmi and feed it to the receiver.
Any of those will likely give you superior connectivity, and may even allow you break the 44/48 Hz barrier to try out some high res audio files?
If none of that works, you could find something like a used raspberry pi 3 with a hifiberry and use that as an endpoint instead of the laptop for a wired connection, before you invest in a new receiver or streamer.
Finally, even if you don’t perceive an immediate improvement going wired, you’ll benefit from the warm fuzzy feeling affirming you’ve got the best potential solution.