I just replaced my stock stereo with the pioneer avh-4000NEX. I also added a subwoofer. It sits in my hatch. I have a 2010 Nissan Versa hatch.

I still have the stock speakers x 4.

I have no idea what after market speaker would better the sound? Or whether to make much of a difference? I also have tweeters included in the stock.

Any suggestions? Thoughts? I was thinking of a budget around $150-$250 for a pair with tweeters?

Thanks for any help or suggestions.

And what size speakers fit the fronts?