Kona Paddy Waggon. Unlike the Langster, it will take full mudguards, and has sealed hub bearings. Recent versions are a little less eye-injury inducing than mine. Geometry of the 56cm frame is fantastic, such a lovely ride. How Hilly is your commute?
My commuting set up cames to about £1000
Bike £550
Orlieb Bag £110
New Durano Plus tyres £60
SKS Guards £30
KEO Pedals £40
Topeak Rack £30
Strada light £240
B&M Rear light £25
A modified seat clamp is needed for the rack (or fit a Tubus Fly).
I liked the Langster, but not being able to fit guards (they can be bodged but there is no chainstay brace) and a rack to a commuting bike was a no no for me. I may eventually upgrade the frame to a Grand Waggon or something shiny and Ti. I like it that much... And here's a picture...(now I've worked out linkage)

EDIT: having looked on the Evans site, they don't seem to have the Paddy Waggon this year
. If you want drop bars, go for the Dawes or perhaps Trek District. Coopers look nice, but I think commuting bikes should have eyelets for guards and a rack.