I was never a fan of dunlops narrow head width...it seems like they were going the opposite direction of where they should have. The M-fil 400, for instance...I bought it real cheap and felt like it had a tiny sweetspot. The 300's also look really narrow to me
What I'm reading here sounds like an improvement. Of course, I never buy a racquet until it's 2 or 3 generations past it's release, so I'll have to wait a long time on these.