If you already have one of the recently made BG knives, I would think to just keep it and use it.
I'm interested on why it's so hard to get sharp, because my experience with my BG has been that it's very easy to sharpen.
The BK 16 is clearly a better knife, but again, you already have the BG and it is a very usable and functional cutting tool.
I would spend my $$ on good sharpening equipment, so that any knife you purchase in the future, you can sharpen.
I should also add this:
you are here on BF, so you are most likely one of those "knife guys" you hear about. If you have the $$ get both !!!
........... and then a SOG Seal Pup Elite
.............and then a ESEE-4
................and then a TOPS BoB
................and then a Dustar Magen
.................and then a Fallkniven F1 and then...................... it never stops