Dude can't go wrong with totem coils. They have the same axle to crown height as boxxers but with 40mm tubes like the fox 40s. Fitted a pair to my sx trail last week got to my local dh track and was totally blown away,glad i didn't fit triples on.
that bike is sweet.will be so nice when its done,would not recomend 40s on it though.would fell so weird and heavy over the front end,but riders choice.
if you buy fox 40's of TF tuning they can lower them to 180 or 170 i can't remember before they send them off. they look really smart on the sx trail. hope that helped
not sure yet.gonna get some manitou travis 150's off a mate till i can afford some 160mm fox's.was gonna get some triple crowns but manual says 170mm is the limit :-(