Installed the Nakamichi NAM3510-M7 into the Proton Persona last week. So glad to find out that the fitment is not a mjor issue. yes there will be some gap, but we managed to use some foam tape to cover it up and the customer finds it acceptable.
This Nakamichi is equipeed with Apple CarPlay and Android Auto. You will be hard pressed to find units with these features at this price point.
On top of that, we also replaced the factory speakers with Kenwood KFC-PS170C component speakers. Having tweeters up top improved the sound dramatically.