Some random thoughts on tourers...
You mention the Dawes Galaxy in your post. IMHO, that bike is very competent, but rather dull and old-fashioned. It is a typical British touring bike... which is different in many respects from the bikes you'll see being used as tourers on the continent or, indeed, on the pages of crazyguy. I've toured on half a dozen different bikes and (whilst my current Surly Crosscheck is fantastic) I have yet to find the "perfect" tourer. Anyway, my perfect tourer would be different to everyone else's!
It would definitely
not have: drop bars, cable brakes, suspension or any type of derailleur. All those things are fussy, fragile or useless.
It would have:.steel frame, hydraulic brakes, Alfine 11 hub, flat bars, front dynohub (for a phone charger and lights)
I can live without a front rack. But I'd be tempted by any frame that would allow a belt drive instead of a chain.
Off the peg? I really like this:
http://www.dawescycles.com/p-404-nomad-700c.aspx
£740 from here:
http://www.bikes2udirect.com/B3963.html
Although I'd fit some Magura brakes ASAP. That would make it (IMHO) a sensational tourer, capable of anything.
http://www.chainreactioncycles.com/magura-hs33-silver-black-brakes/rp-prod62012?_$ja=tsid:46412|cgn:Magura - Brakes|cn:Chain Reaction-UK-PLA-PLA-All-DT-SE|kw:232747UK_Magura HS33 Silver/Black Brakes&gclid=CKDavbCyxroCFfSWtAodnWAAsg