OP you’re falling into the trap that most on here do in that you think you need a new bike (or more travel) as you get better at riding a bike. You don’t. You might want a new bike (who doesn’t 😀 ) but a better set of forks for your current bike would see you right (and maybe a shock tune at the back). You’d still be quids in and be on a bike you’re familiar with.
I’m 6’5″, 15st and ride a large 26″ stumpy evo. On paper it should be too small but i love it and don’t feel cramped (i come from a bmx background so it feels huge 😀 ). It suits how i ride which is mostly standing unless an uphill is involved and don’t mind it appearing too small when i’m seated as that’s not why i ride.
I do like the look of some of the new gen longer bikes (not taller – i’m not a fan of tall seatposts), but not enough to spend a load of money on. If i break my current bike i’ll change it but not before (again not your typical STWer 😛 ).
You’re pretty much spoilt for choice these days if you decide you need a new bike though. Haven’t ridden any of these new style bikes but a few friends have the L/XL Enduro 29 and love them.