I just got a new Arai Quantum yesterday from Ebay: $295.00 and I have the best fit I've ever had in a helmet. What's really nice too are all the vents and extra fetures. But it is such an individual choice; what's good for one might not be good for another. Take a shot and see what you like.
Where on ebay did you find the Quantum for $295? That's pretty good. I'm tossing both helmets around right now trying to decide, price being the only factor to consider (The Arai wins, no contest). If I can get the Arai for the same price as an RF, it's a done deal.
I bought my Arai Signet GTR off ebay for $320 and it even had a manufacture date of 10/2003. So my guy had to be a dealer trying to beat the "no online Arai sales". When I won the auction, you got to select what size you wanted.
ARAI wins my vote, I didn't care for the Shoei's i have tried on.
Thanks for the input guys.. ended up getting the Arai. It fit much better than the Shoei RF1000. The guy at the shop agreed and said "You don't have a Shoei head"... I was like...."oh, thanks".. FYI, i have a round shape head..