OK, which one?

At this level these units will sound slightly different and it will come down to preference and features you need. There’s not going to be a holy $hit moment when you go from one to another. I’d go for the bluesound because of its reputation for sound quality for both dac and streamer sections 

And I’ll remind you what I said earlier - my prediction is neither will sound as good as your audiolab transport. Set your expectations accordingly. I hope I’m wrong but it’s unlikely so. 

Op look at my posts on ifi ZS new firmware  its support QC  Sounds better than WiiM ultra without DDC

Yes, I've no illusions that at this price point, these choices are going to be a musical revelation, but they gotta sound better than streaming through my iPhone.