Avène's Eau Thermale* (£10/300ml here or £3.15/50ml here) is by far the most budget-friendly of the three and is unscented, so would be my suggestion if you have sensitive skin or just wish to avoid scented mists. Unlike the other two, this comes in a pressurised can, which I think is why it gives the finest mist. I've been reaching for this through the day lately as it feels so refreshing on the skin, and it doesn't interfere with my make-up at all. This is also supposed to help calm redness and irritation, but I've not really had any problems like that while I've been using it, so I can't comment on that one I'm afraid!
I've reviewed Balance Me's Skin Bright Toning Mist* (£12.50/30ml here) in full here, but in short this feels really nice and hydrating on the skin, and has a lovely rose scent which makes it really pleasant to use. The plastic bottle means it's travel friendly, although the cap isn't as tight-fitting as I'd like, so I'd recommend being careful if you are carrying this one with you. Generally speaking, this is the one I'd reach for in the mornings as part of my skincare routine.
[*Product provided for consideration.]