Are you still using the V20, and if so, do you have any advice for someone wanting to basically replicate their iTunes experience?
Getting the V20 was (and still is) one of the best decisions I've made. I really don't know much about later LG models, but two very great things about the V20 are that it takes an SD card and the battery is user-replaceable. I believe when I was researching it the specs said it could take up to a 256gb SD card. I put in a 512 and had no issues. As my collection grew, I replaced the 512 with a 1tb and still have no issues. I can carry my entire music collection in my pocket.
The aftermarket battery I bought for it died after about a year and replaced it with one that I'm still using today. And it fits better than the first one so I don't need to hold it together with rubber bands. :-)
I have the premium version of GoneMad and use MB's WiFi Sync app to sync from MB to the V20. Again, no issues. I don't use reverse (two-way) syncing. Nor do I care about song/album ratings. I'm closing in on 100 playlists that are pulled from almost 40,000 tracks and that's all on the V20's 1tb card with plenty of room to my collection to grow. When I need more space, I'll dump the Classical tracks I have on the V20 as I mostly use it in the car and/or when traveling and Classical doesn't do anything for me while driving other than put me to sleep and I'm told that's not a good thing.
I don't know if you'll find a V20 at this point in time. I got mine about three years ago through ebay. I paid under 100 USD for it. If you're aiming to use a "smart" phone strictly as a music player, you don't need a current model. Nor a wireless carrier plan. I can use its WiFi if/when I want to connect to the world.
I never used itunes other than once to get my ipod classic set up to use MB. You can see my post in the Tips & Tricks section (
https://getmusicbee.com/forum/index.php?topic=18506.0).
I'm happy to answer any other questions you might have. And I'm curious to see where you wind up.