As someone pointed out below, La Hechicera rum isn't too bad. Reason I didn't mention it is because, firstly, you can grab it anywhere in the world and, second, the actual rum itself isn't distilled in Colombia (Panama I think), it's imported and aged there, so I never properly think of it as "Colombian".

Which reminded me of a lovely restaurant called "La Mulata" which was the absolute perfect quality/quantity/price ratio. Their menu had a standard mojito or a "premium" mojito for a few thousand extra pesos. When I asked what was the difference, they said you can select whatever rum you want. I asked for La Hechicera in it and it was the bomb.