Sounds like you've made up your mind already Dave, but after my off last year, I replaced my AGV cheapo helmet with the HJC CL14. Cost me $320 and I'm happy with it. Fits my noggin really well - best fit I could find. Only thing that I didn't like initially was when the visor is all the way up, I can still see it (just) in the top of my vision - I'm used to it now tho.
Also, I disagree with other peoples comments about restricted vision - I reckon it's great.
Just my 2c.
Cheers,
Russell.