I have heard a lot about the DAS - and there have been positives and negative. Critics have disliked the DAS while some actual users have had decent experiences. I am seriously thinking of just going without the DAS, and changing the tires to summer performance (and eliminating the clearly problematic run-flat) which may improve the handling. What are the views of actual users out there? Has anybody decided and bought a non DAS Q50 or test drove both versions (DAS and non DAS) to provide any useful comments? Any insight will be much appreciated -- i should probably go out and test drive but I would love to have reviews from users as well. THANKS!