Orange 5s seem to be a marmite bike; whether they’re hated by those that have test ridden them I don’t know.
As a 5 owner, I can say that for the last seven years it’s been a superb bike and am about to jump on it this morning and give it a hammering. It’s done several 24 hour races, mini-Enduro, mini DH Races and the weak link is always the rider!!
Only reason to get a new full bouncer is that the forks are on their way out and there is extremely limited choice for a 140/150mm 26″ straight steerer replacement. If I can afford it I’d like a new 5, but I might go for a Boardman FS Pro for 2 years at £1050 and maybe then swap the parts to a five frame set when I can afford it.
Know ‘owt about the heckler but I suspect you need to test ride them both to determine the best one for you.