I have this receiver and it's stock speakers. Looking to upgrade the receiver and hopefully someone has a good answer or knows a lot that can help me. Really not looking to spend more than $300. Im hoping to use the same speakers if possible to still improve the sound. Provided link manual for anyone who can help
If your aim is to add HDMI switching and lossless surround sound codecs such as Dolby TrueHD then a new receiver makes sense. In your price range Onkyo would be a good choice.
If you aim is to improve the sound quality then new speakers (particularly the front three and subwoofer) would probably get you a bigger improvement than the receiver. The rear speakers don't contribute that much to the overall sound quality so you could leave them last. A better subwoofer would make sense if the bass quality or quantity are not to your liking. The front three should be matching so you usually try to do them at the same time.