Greetings and welcome.
My two penneth. Echo the hardtail suggestions, but it sounds like you’ve got your heart set on a full-suss, so if you really want one, get one. There’s more chance of you riding something you really want.
If you do go full-suss, 6 inch is a hell of a lot of bike for this country and you’d need big balls and big skills to get even close to its limits. You see a lot of middle aged men dressed as stormtroopers wobbling around the woods on 5/6 inchers who would be far better off on a hardtail or light 4 inch susser.
I came in from the other end of the bike world (bmx)5 years ago, and got a hardtail and have upgraded everything (is sub zero to 456 upgrade or downgrade?). Still wouldn’t have a clue what full-susser to buy now if i was to get one, there’s too much choice.
Do demo days, borrow bikes from shops and friends and just try to get on as many as possible, even if its just to discount a few.
If you’re thinking about Elsworths, i guess budget isn’t an issue, as it would probably be over 3 grand for a decent spec build. If thats your budget, taking a couple of hundred quid hit on a second hand hardtail would be worth it to get you out there now and not waste money on the wrong bike.
Nice dilemma to be in, wish my budget was that big.
Good luck