I’m not a resident light expert, but I got a Minewt 250 Cordless from the nice folks at TBC the other week after demoing one. It’s not the brightest light in the world, but I fancied something all-in-one rather than a separate battery pack. If you can live with a separate battery pack, you could get more lumens for the same price (a shade over £100).
I currently run it on my helmet as my only light (apart from a rubbish cateye on my bars which is really just to be seen) and it was adequate, although my plan is to add another similar light to my bars next winter.