I've just bought the middle of those 3, so you can't have one of those
And your prices are wrong, the RX7 which is what Lids 2 and 3 are retail for £499 and not £399... I got a deal on mine and got it for £449. Watch out theres one particular wesbite that has those for £379, but they are not Arais, they are a chinese copy of an Arai...
Its really comfy and for my head a much better fit than my Shoei was. Its also lighter and the vents work better ( sometimes to well ) The only downside is that its much noisier than my Shoei was and I have to wear earplugs now even on a short journey.
I was surprised when I tried it on that it was such a good fit, I've tried on Older Arai, Astro J etc and they just dont fit my head shape, but the RX7 does.
Why not have a look at the "Chaser" model Arai, its a bit less money that the Corsair RX7 is and you might find one that you like the look of.
Pics of mine here
http://forums.sv650.org/showthread.php?t=86834
HTH