This article is positive on long term oil prices for Western Canada based on rival pipelines and shipping by rail.  Interesting thing is that  the price difference that is effecting companies like TBE has already narrowed significantly.  That quote is below.

"Western Canada Select fell to a record-low discount to the North American benchmark, West Texas intermediate, of $42.50 in December, but has since narrowed into the $25 range, according to Bloomberg."

Here is a link for this article:

http://business.financialpost.com/2013/02/08/rival-pipeline-projects-could-help-shrink-crude-discount/?__lsa=7393-c9bc