I'm a helmet collector:
Shoei Neotec: Got it for the modular feature. Fit is good, and runs true to the sizing chart, love the internal visor, but it's heavy... most modulars are. Great venting, and noise isn't significant. Everything internal is removable. Very solid. No real choices in face shields other than clear.
Arai Signet Q: Runs large. I'm normally a large, got this in a medium. Incredibly plush. Cheek pads were tight, but they have 5mm layers, which you can remove one at a time. All internals are removable. Non-ratcheting visor (no detents), which I love. I hate detents. Smallest shell of all my helmets. Very quiet. Shitty depressions for speakers.
Scorpion exo-1100. My favorite. Quickest face shield swap, very quiet. Runs small --definitely have to go a size up from your norm. Excellent internal visor (although, swapped the default light smoke for dark smoke). Awesome shield choices, and the mirrored gold looks sick with the matte black. Nice deep pocketed depressions for communicator speakers. Relatively light (about 3.5 lbs.). Everything internal is removable. Big negative: liner is breaking in too much on crown, and the deep air-flow channels in the EPS are actually beginning to leave ridges on the top of my head after a few hours' ride (they go away, but I feel like a freaking washboard for 1/2 hour. Losing favorite status because of this.
Bell RS1: About to become my favorite. Sizing chart runs true. Best field of vision. Shield swap even faster than Scorpion. Most comfortable of ALL my helmets, including the Arai. Feels like you're slipping into an old sofa you've been breaking in for years... Deepest pockets for communicator speakers. Everything removable except for the neck roll (which pisses me off). Comes in a million graphics, as well as solids. Awesome selection of quality face shields at reasonable prices. Incredible Photochromatic face shield available for this (same as Vortex and Race Pro --changes tint depth depending on sunlight, or lack of -- a little pricey, but worth it... no need to change shields, no need for internal visor).
Tried to buy a Shark Speed-R in matte black, but can't get one anywhere... and didn't want any "replica" models that were available.
My $.02