I used 600-610 as a pad stack range since you mentioned going a little lower, and 475-485 for pad reach based on your Adamo-adjusted figure and your note about feeling a tad stretched. Ended up with three options for consideration:
1) Small + 100/10. Definitely on the low side for bar stack, requiring almost the full 50mm spacer stack for the extensions to get your pads in position. Upside: lots and lots of room to go lower on pads. Still, probably not the best choice if you spend lots of climbing time out of the saddle or on the bullhorns for "position fatigue" near the end of long course races.
2) Medium + 100/10. Now you're on the low end of the extension stack, resulting in a nice clean look. Can go as low as 590 on the pads. Bar is a little higher but the reach is getting out there, so the bullhorn position notes above apply again. Nominal pad position is spot-on, meaning you've got lots of fore-aft trim to play with.
3) Small + 100/45. Interesting idea. Highest bar stack of the three by a small margin, and likewise the shortest (relative) bar reach by a bit. At first glance the nominal pad reach seems short, but that's based on a centered mounting position - which leaves upwards of 25mm fore & aft play simply by changing which set of mount holes you use...never mind the ability to move the clamp itself along the extension. Near the bottom of the extension stack range again so another clean look, and room to go as low as 595 at the pads. The sizing chart shows a max saddle height of 730 with the shorter post (which is stock on this size frame), but that's based on a low-profile saddle @ ~40mm rails-to-top...your Adamo would more than cover the difference.
Wonder if your bar reach needs might be the deciding factor? If you measure/estimate it from BB to where the brake levers mount that's the figure to compare to the bar reach figures for each of the above: 670, 688 and 660 respectively.