Doesnt sound too bad. I've done 20,000 and dont need any just yet (though sure I will soon). Probably a combination of having a less powerful car and mainly motorway driving. Its always worth paying the extra for decent tyres - can make a big difference to the way your car handles/stops and could one day save your life. For that price I would go with the dealer. Watch out for some of the cheaper local garages. Last time I used a cheap garage he managed to stick them the wrong way round (despite the big sign on the side saying these tyres are directional) ;)