I picked up the previous years 9.2 (low profile alloy wheels) as a demo bike, brilliant bike.
Immediately picked up a couple of kmh, at the same low power output
I don't race and it works well for me on a three to four hour ride on "b" roads (coarse blur metal) out and back that were less comfortable on a custom Ti frame (on the same 25mm tyres).
good response, stiff, handles well. Brakes work decently - not as good as say Dura-ace but good.
I am 183cm, and the 56cm works perfectly for me. the 58 is probably a bit big. Changing bars/stem combo is expensive (told about $600 odd) so you want to buy the right size. That said the stack/reach are not super agressive in the H2 fit, so best to compare those numbers with what you have now.