ive got a 2011 surge. i run it with 140mm revelations. the main reason i went for the surge is the it has a much lower bottom bracket than most the other steel frames, which makes it far better for cornering and more confident handling. it also has a really lively feel. it does have a bomb proof build and though its only a fraction heavier than a blue pig, it does have a stiffer ride due to the bigger seat/chainstays.
i use mine for allday rides, all mountain hammering and downhill runs and ive just fitted a dropper post ,so i will be doing some enduro racing on it this year.
i can’t see another steel frame out there that i would rather have!