In reply to DragonsDoExist:
When you say "FSR" are you looking just at Specialized bikes (FSR is a name they apply to their bikes - it used to mean "Future Shock Rear") or are you looking at full suspension in general? Rear suspension isn't necessarily going to help with loose, steep rock stuff but it can be forgiving of errors. Something I would recommend is a bit of practise/coaching (this may not apply to you), but again we've got mates who do similar stuff and think a new bike will make the difference, when skills are the biggest point that needs addressing (this is definitely true for me).
A real 'game-changer' for steep stuff if you haven't got one already is a dropper seatpost; so much better than stopping to change saddle height or not being bothered to.
I tend to evangelise about hardtails - I've tried full suspension and yes its alright, but I much prefer my steel HT- full sus can be quicker downhill but are heavier and less efficient on climbs. I'm also not very keen on Specialized as a brand, whilst they seem to fit reasonably well, I think you get much more for your money elsewhere. They are well marketed and available everywhere but seem very much 'built to a price' with some compromises in componentry. My wife had a Safire FSR Comp, the spokes were all just a bit shorter than they should be, with cheap alloy spoke nipples that repeatedly failed and the Specialized HiLo hubs were pretty poor and didn't last - fine once I rebuilt the wheels. (similar problem on a friend's Safire too).
Another friend recently got a new full sus bike, had her old one serviced and passed it to her son. When she re-borrowed it for a day she was surprised how nice it felt - so don't underestimate the benefits of good maintenance and replacing worn out parts.
I agree it can be a pig to find the right one though - I tend to build up ours so can pick and choose a bit.