The first thing i did was change out the bars. I put on salsa drops. Ripped off the stickers and got some new tape. I'm waiting for my FSA gossamer cx crankset to arrive today and put that sucker on. So yah, From stock. Change the oem bars first, they are really heavy. Cranks are pretty el cheapo also. Thats about it for a 500 buck bike. Also whatever pedals you like of course. I run 46x16 or 46x17 for the hills.
I'll post pic when i put the new cranks on.