cyclezen

Hi All,
So after riding a 29r, I've decided to get a new FS bike (coming from a mullet '04 Epic 27.5x26).
I do have a budget limit $2300-$2500 USD, out the door.
so the question and need for 'opinion' is: Buy New -something similar to a Polygon T7 (out the door $2100ish) or get a 'used' bike of higher grade (looking 2016 Stumpy FSR Carbon Comp 9r, can get for $2300 ish)
Wish I could afford a NEW Scott Spark 970, but that would be $3100 out the door. So maybe some future time...
I'm not a hard rider, but do technical terrain at easier speeds, go easy on downhills also, 150 lbs, buying a Lg,size. - prolly class me as a 'down country' rider. Even so, most of the rides I do are rocky trails, not smooth forest trails. Lots of climbing, like doing long mileage rides (14-20 mi, 2k ft gain usually)
"New" means new drivetrain, lower level components though... missing dropper post, etc...
Used ('16 Spec Stumpy FSR Carbon Comp) means worn drivetrain ( but still not 'worn out', chain is still well within limits), good, but used tires, frame in good condition with minor blemishes, mid to top level components ( Fox suspension parts) but 2x crank (I'm ok with 2x, I don;t consider that a big factor for me) , good dropper post, topline shimano brakes, overall appears lightly ridden over it's 'use' span. It was clearly a superior bike when new...
I do tend to keep bikes for a long time, and keep them in good working/mechanical order...
I have been a 'roadie' for 58 yrs, quite high level for some of those years. Casual MTB'r for about 25 yrs, but tending to much more mtb time in the remaining years.
Skill level is 'passable' for what I ride, and expect to improve quite a bit, as I ride and learn more...
Not sure If I'd 'outride' either option, ever... But I have a good sense and feel for good performance equipment.
Would love all opinion on what you all might do, possibly something I haven't considered in reviewing the options ???
Thx
Ride On
Yuri