Let me start of by saying that I don't only like these because they're the twall promodel so dont give me any shit whatsoever, but anyways I feel like this goggle is superior to the I/O and the Airbrake in terms of lens changability
Sorry to dig this up, but I have a pair of these and they're extremely good! Way better than my I/O's and the ease of changing the lens means I wear these over my Canopy's. This is a great goggle and will be much cheaper than the Anon M2... The lens options are good and I've not had any problems with fogging yet. It's nice to break away from the norm a bit too!