Are you shooting Canon, Nikon, or other?
If you have to choose between the two (18-55 vs. 55-200), go with the 18-55 - it's a more versatile lens for everyday stuff and you will probably find 55mm to "tight" if it's the shortest zoom you have. You can always rent telephoto lens from certain camera shops in Calgary for the weekend (i.e. when you know you are going to need one) for a very reasonable price.
After having your camera for a little while, you'll know if it's something you want to take up more seriously. That's when you can start to expand your glass collection. To me, it makes the most sense to invest in some good quality lens' because they will last (really, the technology isn't changing all that much - especially in comparison to digital SLR bodies).
The 50mm f1.8 will be a fun lens to play around with in low light conditions ... and it's quite affordable.
When looking at lens', don't forget to multiply the zoom ratings by approximately 1.6 UNLESS it's a lens designed specifically for digital SLR's.
I've bought stuff from this website in the past - with the dollar close to par, you can get some pretty good deals if you buy a few things to even out the shipping costs.
www.adorama.com