Out of the three brands you name, NONE of them would be my go to brands, hehe.
Raleigh don't really have that great of a reputation these days, I would probably shrug Raleigh off tbh.
Cinelli, well I don't know why there are not many of these around, I have a Cinelli bike (see my avatar), it is very nice but I am the only person I know with one, possibly a distribution thing.
Dawes, they are only for tourers and audaxers right?
Basically, my process of buying a bike is, identify what is within budget, identify which ones I like the look of, what are the features, what is the support network going to be like (branding comes into the equation here) etc, then finally what does it ride like. All the while the list will be getting shorter.
I have considered many brands, but sadly, with many of the budget brands, I have found either the the point of sales to be less than confidence inspiring or the aftersales to be likely lacking (or a crap warranty on offer, 2 measly years, you can shove that).
I am quite brand loyal to Cannondale, but I do as I said above own a Cinelli bike. I would from now on, tend to go to Cannondale automatically because I like them, I would see what they have to offer by means of an upgrade, there is added benefit here because they operate an upgrade scheme (there is that aftersales/support network I mentioned above coming into play), then look around to see if there is anything else enticing. TBH now though there are very few brands I would buy a bike from, most of these being well known brands. It is not snobbery, it is because it is a known quantity.