If you do your homework and buy used you'll potentially get a very good touring bike for your budget - used prices of bikes seems to be coming down, especially the less fashionable older / steel / touring type stuff.
Personally I like Genesis and they potentially cover both ends of you needs with the
Croix de Fer (more gravel / adventure) and Tour de Fer (more touring oriented), however being fairly modern and trendy prices are still fairly robust.
If you're happy with something older and more touring-centric the Dawes Galaxy is well regarded (if available in a bewildering arry of specs spanning decades - some better than others), while less-well-known domestic offerings from SPA and Thorn are worth looking out for. There's also the Ridgeback Panorama, Claude Butler Dalesman, Surly LHT and crosscheck; while Kona stuff always looks nice.
I've just bought a
2016 Fuji Touring for not a lot of money - a relatively budget offering but I'm really impressed. One of the same spec, nicer nick but fewer accessories sold yesterday on
ebay for £275
I trust you're only looking at steel..?
