I suspect this is one of those areas where conflicting opinions will proliferate
Having tried quite a few of their different two-layer socks I've finally given up on 1000 Mile. They simply don't fit me well enough and seem to flatten and stiffen after only a few washes. That said, they make some cushioned, single-layer socks which have worked very well for me. Bridgedales likewise get plenty of recommendations, but not from me: the first pair I had tore my skin to ribbons and the pair I have now are starting to come apart after less than a year.
Recently I've been using HJ Hall Rambler socks (available in red if you want to sport the, um, "classic" rambler look
) which I think might be a little more cushioned than the Commandos mentioned by Mr Dazzler. They can be found at a pretty decent price if you shop around on eBay etc. After a day's wear they do tend to bag out a little (they're a fairly traditional loopstitch inner design, unlike the pricier socks which have various knits and tensions in different areas) but quickly resume their shape when washed. I've also had great success with Smartwool Hikers, although they're far from cheap.
Unfortunately the very best socks I've had are a pair of loopstitch "Explorer" socks sent to me one year by my sister in Australia. She can't remember where she bought them and they didn't have a manufacturer's label attached, so I'm still searching for another pair of them.