I need to replace the two front tyres on my 2007 Lexus GS300. The car has only done 19,000 miles so I am going to get the tracking checked first. Once this has been checked, and realigned if necessary, I'll get the tyres fitted. Should I replace them with what is currently fitted, i.e. Dunlop 225/50 R17 94Ws, or is there a better tyre for my car? I currently do about 6000 miles per annum, split 50/50 between ordinary roads and motorways.