I DEMO'ed 2016 Slash just recently in Copper Harbor and that bike felt home on those trails. I did the shuttle and after run 6 or so bike felt awesome. The minute i needed to start pedaling it up hill though - not the best experience. But doable. Bike feels way slack for comfy pedaling.
2017 Trek Slash looks great, and i would love to DEMO it, but as of now I am looking for "DO IT ALL" bike in Madison area (besides that all-stiff-belt-drive-single-speed-project in my mind...(good think wife is not on this forum)).
I have been to Camrock Sport too, actually last week they started selling 2016 TREK FACTORY DEMO BIKES...
Pretty good pricing as for used bikes with full (like-new-bike factory warranty).
Almost bought 2016 Trek Remedy 9.8 that i had a chance to DEMO last year on TREK trails and just had so much fun, bike felt so good!!!
Though, now i have that 2017 bikes bug in me and Bronson "keeps starring at me" in hot pink...
Decisions, decisions...