There are a number of players in the CBM arena which currently represent good value. Both BUL & BOW are in that category.
In my iopinion BUL has better overall prospects at this stage because of its large CBM acreage (approx 30,000km2) compared to BOW (approx 10,000). Both look good though.
The contingent resource of 250PJ is just the start of drilling for BUL and there is massive upside.
I do have BUL but not BOW (at this stage!)