DM has them on sale, where you get the extension, squaring and the saw for £1,100
The AW10BSB2 is also on sale as a package deal at Ax, and comes in about the same specs, for £970.
The AW has a sliding table travel of 1220mm which seemed important to you.
I cannot speak for the quality of either, however, from all i have read on the forums, i think you will find that the Ax offers great customer support, you will find lots of tips and advice on the forum from other users, and is slightly cheaper.
DM are very nice, however you will really be relying on talking to Record directly for any issues, and I have not heard much that's positive about that...
My instinct is that you can't go wrong with the Ax, and although I have a supposedly superior brand Scheppach, I would almost certainly go for the 10" Ax, or it's 12" big brother if i had to do it again...
just my tuppence!