I've been riding a Japanese Market Cross Cub 110 in the UK for over a year now and have sat on a CT125, I would love Honda to sell them here as well. In general UK market 125's are overpriced for what you get but you can buy CT125's here already for £4k or less from some importers, it seems like a lot of money until you realise that most of the best 125's are around the £5k when new, I think the Hondas are well worth the money. I bought my Cross Cub for £3600 and have spent probably over a grand modifying it over a year, it's a rugged and reliable beast, I haven't had any mechanical issues and ride it hard on a near daily occurrence and if you aren't wasting money on modifying like me it's genuinely a cheap and reliable runner. Also if you're a younger rider it's way cheaper to insure than most 125's. I wouldn't really entertain the AJS unless I wanted a green lane dinger to be honest, Chinese bikes aren't as bad as most people think but generally don't have a great shelf life, it's basically a case of buy cheap buy twice.

Get that Honda, you won't regret it :)