A bit backpackerish, but definitely good ...
Lonely Planet	http://www.lonelyplanet.com
Rough Guides	http://www.roughguides.com
... and some decent travel companies, good value for money (you could say here that these are some of the cheaper companies), seen as a bit off the beaten track.
Exodus Travel	http://www.exodus.co.uk (Tibet, Uzbekistan)
Explore	http://www.explore.co.uk (Tibet, Uzbekistan)
iExplore	http://www.iexplore.co.uk
Travelbag Adventures	http://www.travelbag-adventures.co.uk
Imaginative Traveller	http://www.imaginative-traveller.com
... and some mainstream companies.
Travelsphere Holidays	http://www.travelsphere.co.uk (China, Burma, Malaysia)
Getting expensive ...
Voyages Jules Verne	http://www.vjv.co.uk
Kuoni Travel	http://www.kuoni.co.uk
Thompson Holidays	http://www.thomson-holidays.com (Egypt)