mboy, I had a 60mm stem and 670mm bars on it for the last year, switched to 50/711 recently. A typical ride for me is 3-4 hours of ragging it round the woods though I’m out for longer when I have the time. To be honest I get a bit confused by discussions of bikes feeling too cramped for long rides as my arms bend at the elbow! Clearly I’m not normal as I’m also using a straight post and have my saddle forward on the rails too… As long as my knees aren’t hitting the bars when I stand up to pedal, especially uphill, then that’s long enough for me. Essentially though my Soul is built like a lighter BFe (140mm forks with not much sag, 1×10, dropper, etc) for someone who only does smaller air and tries to ride smooth.
I’ve been doing some maths on this but it gets rather complicated. However, widen the bars by ~30mm whilst shortening the stem by ~10mm and the reach remains the same. Also, I note that the difference in top tube length between a medium and large Cotic is only ~20mm – knowing how much I prefer the handling with a short stem I’d rather have a large with a 60mm stem than a medium with an 80mm stem – it’s not like there’s a shortage of standover clearance if you’re vaguely in the right size bracket.