If there is little to no difference in price, I would go with the newer obviously, but if it ended up being 200-300 difference I would either wait and see what all can be done with the 4000 firmware (there will be at least one more revision coming to us to fix things that were promised a year ago... or else class action lawsuit) and potentially the ability to copy the 4100's firmware to the 4000 (if they TRULY are hardware identical) at some point.
What things were promised a year ago that need fixing? Someone posted about avicsync which is a subscription based service, doesn't sound that great to be honest.
Also, someone on a Subaru forum said you can run the 4100 firmware on the 4000nex but you lose a couple things but they weren't sure what exactly. I installed a 4000nex 5 days ago and it is a little quirky but overall I like it. I found a review on Google and the guy got a 256 GB sdxc card working and since the unit has flac support that provides a ton of lossless audio. I haven't noticed any degradation of music compared to using my cars stock clarion head unit so not sure what Tekki is referring to. I have played music over bluetooth, "ipod" over usb and then also using Carplay "Music" icon, all of them sound just fine/great. The person helping me install the radio even commented on how well the music sounded. My car seems to have pretty decent speakers so i'm sure thats part of it as well.




