Durban Poison is good -- right up there with C99 in my book. Another good strain is Power Plant -- yeah, not pure Sativa, but it's mostly Sativa.

The Dutch Passion Standard breeders sells an inbred only [ IBL ] strain of Power Plant, never hybridized, for £21.98.


...Or about 40 'fascist dollars'.

But seriously. IBL strains are nice -- just about guaran-fucking-teed the genetics you pay for.