To offer a bit of a counterpoint to your post, I looked at the Dunlops as well but just recently purchased the Conti ExtremeContact DW's for my NA and couldn't be happier. I ran the same tires on my race car at Road America in early April and fell in love with them for their grip and feel. Now that I've got them on the Crossfire too, I find it literally impossible to break traction while cornering in the dry. Hard first gear launches in 1st will break them loose for a split second but they grip so much better than any tire I've ever used. Additionally, they ride better than my Michelin Pilot Sport AS+ that I use in the winter and are quieter as well.

The Contis cost about the same as your Dunlops but I'd imagine it was a bit easier to find the Dunlops in stock whereas I had to wait a couple weeks to get my tires in.

The only downside I've found with the Continentals is that they aren't quite as responsive as I'd hoped they'd be. They're certainly not bad by any means and still very confidence-inspiring in terms of grip, but I suppose there's some trade-off there with the softer sidewalls for better ride comfort. I'm looking forward to really putting them through their paces on the race track in a couple weeks to see how they wear after some real abuse.