I've got a titanium trapedioizal (sp?) Remus Revolution.
I love the sound; it's deep, and not too loud even with the baffle out. The build quality is excellent (i'm an engineer and IMO it really is well made). Its very solid and the finish stood up to a winter of commuting and still looks as new.
£310 is, perhaps, a bit steep but mine was a xmas/birthday present from the mrs and i'm VERY happy with it.
Might go and get the sound level tested soon to see if it passes Castle Combe's noise regs with the baffle in.