Well, Ford vs. Chevy isn't really contest for me - I find GM to be too uniform and uninteresting at times, tho they do have some really nice vehicles (Impala SS, Subruban, GN, Regal, Typhoon/Syclone etc) and while I have owned a couple of Chevs, I currently own 3 Ford products....
But I have to agree with Supernaut - for muscle cars, Mopars rule me. And I feel that Chrysler is one of the few companies doing somethign interesting in automotive design today.