Hm, I'm no help. I have black leather medium and tobacco suede medium. Love them both. Tobacco is special but the black gets more use as it's sturdier and works well with my wardrobe. PS suede wears well though and looks great. And I agree, the medium would be a great size on you. The large is really quite large, great for carting documents etc (as you say, office bag).
Gorgeous bag! I'm down to deciding between the medium suede in tobacco and the medium leather in saddle... decisions... decisions...