thanks Pleiades, great information again!
As I thought the PC5 has more options; I'll see how finances go over the next few weeks. I'm planning to change the exhaust also and to run foam filters which I believe will be better for use in dusty conditions (Morocco trip end of this year) and for that reason I'd like a perfect set up.
I believe the PC has an option where its possible to swop between 2 modes, perhaps one for economy on a long trip then switch the power setting when required? I'm going to look into this.

From what I read on here the 2 Kev mods transform the bike.