My snowboard is the Quiksilver Daggers. After buying it at 50% off at my local Sportchek, I realized I couldn't find any info on it online. Thus I measured the width with a tape measure. The width is about 25.2cm.
I should also note that my boots are size 7.5 US. It strikes me odd how well they fit even though I wear size 6 Converse shoes.
I think as long as you don't get a board specifically made to be wide, you should be fine.
Looking up the specs on the Goliath, if you are riding the 153, your waist width will be at 24.5, which, imo is fine.