That Trek is looking really sharp! I think the silver or black seatpost works, and I applaud your bar and STI shifter angling--looks proper! I think a black saddle and bar tape (or just matching saddle and bar tape) will look really nice. Brown does have its place, but it can be tricky. Those Charge "Spoon" saddles are nice. I had one, and sold it on a bike. I'd be game to pick another one up if I came across it. For now it's Prologo Scratch Pro's.