I'm new to the world of DSLRs and just got a 400D. Wondering if anyone had any suggestions for a relatively inexpensive lens for shooting mostly landscapes? Sorry if I sound like an idiot, but I was looking at Canon Normal EF 50mm f/1.8 II Autofocus Lens mostly for its price. I guess I'm looking for something that will give me crisp detail throughout a big DoF, but that's under $200 (300 would really be pushing it for me right now ).

Thanks so much in advance!

P.S. I do already have the 18-55 mm kit lens