I have an older HJC Symax modular that has been great! All modulars will be relatively heavy though compared to the full face...
I also bought my Caberg Trip Modular from overseas:
But my latest full face helmet is a Joe Rocket 101 Carbon Fiber Transtone. I wear this one when I ride Sookie...It is essentially the HJC FS-15 Carbon Fiber for half the price! It can also accept the pinlock anti-fog shield system. It weighs in at 3 lbs stated, but mine weighs a tad less (mine is a size L, perhaps they spec'd an XL?). Great fit, confort, and no fogging issues so far!