I think the reach looks a bit too short from that picture. Try adding some bar ends - they provide an alternative hand position so you can change when it gets uncomfortable, and add a bit of extra length. I've had bar ends on all of my flat bar bikes since I was 14, and I can't do without them now. Also, make sure the brake levers are in the right place - they always seem to be horizontal, level with the ground, in the shops round here. They should be rotated round the bar to line up with your forearms, which should be around 45 degrees.