With the open faced thing in mind, here are my latest helmet dreams, but they ain't cheap (or easy to find in some cases):
ROOF HELMETS: DesmoI've still got a huge crush on these French helmets that you can't get here. I'm going to have to take a trip to the south of France just to pick one up. The orange Desmo on the left has an A7 Corsair vibe to it that I dig. It still looks like the perfect helmet: an open faced helmet that can transform into a fully safetied full face helmet when needed without having to carry around bits and pieces with you.
Price? No idea, you can't buy them in North America and the former distributor hasn't been forthcoming with where to get the last ones in-country. These guys have it for €469 ($649CA), but then there will be shipping and customs fees. I'd be the only one I see on the road though.
SCHUBERTH: M1Schuberth just came out with a new version of their open faced helmet. Once again, these aren't everywhere, but they are a heck of a lot easier to find than the Roof.
Compared to the French jeux de vivre in the Roof, you get some pretty German meh when it comes to style, though I bet its engineered to within an inch of its life.
Price? $680 from a trusted source, canadasmotorcycle.ca
NEXX HELMETS: X40 Vultron (!)Wired did an article on these many moons ago. Also a modular helmet, but rather than the Roof's elegant hinge, you end up with a handful of bits when you want to go open face.
It still has a neo-tech look to it that I like, though their webpage is a bit of a pig (my laptop is in overdrive trying to make sense of it).
Price? Good question, NEXX Canada doesn't appear to offer the X40 for sale. You can find them for sale in the UK for £249.99 ($484CA), but you also facing those shipping and customs costs.
SHARK: SoyouzAn open faced helmet that comes with all the bits and pieces to make a closed lid if you so wish. It also lets you live your Clint Eastwood Firefox dream.
The Soyouz is also made by a much better known and distributed manufacturer than some of the dodgier off-shore helmets I seem drawn to.
Price? $299 in Canadian dollars with free shipping and no customs surprises from motorcyclesuperstore, a trusted source who go over the top to make sure you're happy with your order. If they go on sale, I might not be able to help myself.