I previously had Accelera Phi's on the front and some Forceum ones on the back. The front ones have worn out (after loads of mileage, so no probs), but the back ones were making a humming noise like the wheel bearings were going. It was getting louder as they were wearing down.
I've just had four new Accelera Phi's fitted and have had a good drive round, including some motorway. I'm pleased to report that the noise has completely gone and they're superb. They're not silent at speed (no tyre is), but they're pretty quiet. You can easily hear the engine in 6th gear at 70mph now, whereas before you couldn't. The bit of road noise now is a normal "aaaaaaaaa" noise, not the "mmmmmm" noise I was getting with the other tyres.
I've also given it a good chucking round a wet roundabout and nothing bad happened. I'd go as far as saying I can't imagine how you could improve on them for any price, and it would be a waste of money to buy anything else - I certainly won't. £50-odd for these or £100-£200 for anything else.