Since it's my birthday my wife wants to buy me something for my K100d. Budget is around $300, so I am thinking flash or lens. I already have the kit 18-55 and a 50-200 mm lens. I was thinking I would like the 540 flash but have been reading a few bad reviews about a pin breaking off. I have also been thinking wide angle lens.
I am a newbie looking for suggestions from those more experienced than I for the $300 addition for my new hobby. I now take mostly outdoor or travel photos but at some point in time I want to start taking interior shots.