I just finished this project in my '04 V70 last weekend. I went with a generic Chinese Android 10 headunit from Amazon. To integrate into the car I used a Crux SWRVL54 canbus interface box. I bought that on eBay. Note that this only works on the basic Volvo stereos, but if you have an HU-613 you are...

I'm pretty sure one of the Grom options gives you the ability to do MP3s, but there are some limitations due to it using the CD changer controls, IIRC only six folders or some such. Here are the links to the three main the pieces I ordered: Headunit - https://www.amazon.com/gp/product/B07WXNZSQT/ref...

A couple more views of different screens - I only posted the home screen before.

Radio:
stereo 2 by kevinr1916, on Flickr
Media Player:

I would (and did) consider a very basic V60. I'd want Denim Blue on the cloth interior, with the cold weather package and H/K stereo. But the lack of a manual transmission is something of a deal killer at new car prices, and ultimately it doesn't seem $42K better than my V70. The modern conveniences...