Each year will have this tough split be easier and easier although always tough due to how bright Sirius A is relative to B. It's spaced about 9.6 arcSec now so is not as difficult as it was in previous years.
Here is the spacing of A to B for this very active (in our lifetime) pair
Year ArcSec
1993 2.6 About the closest
2000 4.6
2005 6.7
2010 8.8
2015 10.3
2023 11.3 About the farthest
reference:
http://en.wikipedia.org/wiki/File:Or...s_B_arcsec.png