My two cents:
Bodies become obsolete. A good lens will work on any body and maintains resale value better. The 60D is an excellent higher-end consumer dSLR. It all depends on what your expectations are.
50mm is a common lens for portrait photography. That's an okay long lens. It's less than ideal for what most people would consider standard landscape photography.
When it comes to lens length, don't forget to consider that unless you're looking at a full-frame lens (of which the 60D is not) you're actually getting 1.6x the focal length. This is because of the sensor size of the camera. Lens focal lengths are given for 35mm equivalents--the diagonal length of traditional film, or full frame in the digital world. So, the 18mm lens is actually more like 29mm. I know this is confusing...but it's definitely worth understanding when managing expectations for what you see through the viewfinder versus what your camera actually captures.
I find dpreview.com to be an excellent resource with http://www.dpreview.com/articles/956...-a-digital-slr
a great starting point to address some of the concepts mentioned in this thread. There are also very in depth reviews of almost every dSLR body and lens on the market.
There are lots of good reasons to carry a spare battery. Shooting video or time lapse is one. Shooting in cold temperatures is another. Multi-day trips away from power sources might be another. The spare likely will not be the make-or-break factor in buying a kit but I certainly find mine comes in handy often enough.
Also curious to know why you're limiting yourself to Best Buy and Future Shop? I find local small camera shops to be far more knowledgeable and interested in spending time with customers. I also find that developing a relationship at a shop leads to confidence in future purchases. Most good shops have also faced the reality that they must compete with big box prices to stay in business and are competitive price-wise.