First Bike Thoughts - AJS? Honda? Yamaha?

I'm going to be taking my CBT this weekend and I'm wondering what I should get should I pass. I believe I'll be learning on an AJS but I've heard to stay away from Chinese bikes and to go for something Japanese such as Honda, Yamaha etc. The Honda CB125F has caught my eye and there's a dealer not too far from here and seems to be able to get a decent price, but I have no idea. What do people think? I'm worried that I'll get used to the AJS when learning and anything else will feel 'off'. [EDIT: CB125R to CB125F - I meant F - finger typed R]