So a quick update: I had a chance to try a 58cm Sequoia, though it was the base model, and it also had the stem in the +7 degree stem position. I can confidently say that bike fit me quite a bit better than the 56. I don't know the exact standover height, but I'd say It was good enough for me with the tires it had to be able to stand at a stop comfortably.
I'm now considering whether I want the Elite model, or if I should get the base model and upgrade to some better components. I'm thinking about running a 2x SRAM hydro groupset as I liked the shifting of the Expert model which also had SRAM shifters. I think either way, unless I have the ability to try the RLT 9, I'm pretty confident in picking up a Sequoia (once I have money).