so how much are the Campbells?

I looked at them a few years back and I think that they were around the £1500 mark. Not sure what price they are now.

I currently use a very nice leather item modelled on the RAF "G" type which was made by Cirrus. As I'm getting older though, I appear to be gaining a little common sense (although my kids may dispute that) and I am valuing me noggin a great deal more and I am again re-considering the Campbell. A good friend of mine has one and cant praise it enough.

I use the following which have been excellent:

Halo Tubephones

Given the extremely limited space in our F1 racing aircraft I had no room for a bone dome or similar so carefully cut the halo from its frame and used epoxy to build it into the shell of a Carbon / Kevlar / Dyneema skydive helmet. Its fair to say our aircraft are extremely noisy and this system works very well indeed in blocking out the racket and is extremely compact while still offering some reasonable protection.

In hindsight you could actually just leave it attached to the frame and wear it under a helmet however I wanted it as faff free as possible. Used it like that for 3 years now without issue.

Link to helmet I use and no I'm not on commission from either!

http://www.carbonphonix.co.uk/index.php?p=1

Another vote for the Campbell Classic. I use it in a SSDR Eindecker. It's great.