In my opinion the mythos st-l are not even the equal of the mythos st they replaced. Treble on the new models is quite hot, and the bass can be tricky to balance between too boomy and too absent. Tried the st-l at home, at the urging of the dealer, and could not get them back to the dealer fast enough. Owned the original Mythos st for a spell, and they were far more top to bottom complete sounding.
Can't speak for the Triton 1, but I have yet to hear a bad thing about them. But, even without hearing them, I'd definitely point you in that direction, simply because the st-l, for me, was a headache inducing experience.