+1 for matt24k’s adjustable fork comment
I’ve always ridden a hardtail, mostly around similar trails to you describe (Surrey hills, Swinley, occasional trips away to Wales) and I’ve found it the most valuable tool on the bike.
The adjustable fork allows you to find your own sweet spot for your bike, your riding style, on your trails. It really helps clear up in your own mind what feels right, and you won’t worry about over/under biked- you’ll know from your own experience what is right for your situation.
For what its worth, it seems to be about 125mm for me on what I ride and I now leave it like that for pretty much 90% of the time. But its the adjustability thats allowed me to discover that.
On another note, I hired a Spesh Pitch on holiday for a couple of days and was amazed at its climbing grip. I noticed the improved traction on short steep climbs far more than any “wallowey feel” that is sometimes described. Great fun on the downhill bits too.
EDIT: having now read transapp’s post, anthem with u-turn revs sounds ideal, but still worth testing the other longer travel bikes to know that for yourself.