The B&M Lyt (until reacently the stock low-end dynamo light on Bromptons) isn't a bad budget light for city use: Nice big illuminated area for being seen, and a perfectly acceptable beam for pothole-spotting. There's a 15Lux version with no standlight, and a 25Lux version with.
The newer Avy isn't much more expensive, and is probably comparable to the IQ Fly or early Cyo.
I expect there are competitive offerings from the likes of Basta and Axa, but I've not seen them in operation.
B&M Cyo Premium is the best bang for buck, but about double the price.
Lots to choose from in rears. I recommend one of the rack-mounted lights with a large reflector - all the dynamo ones seem pretty reliable. B&M Secula is a good light available in mudguard and seatsay mounting flavours, but they tend to get bashed.