My only real experience with Sativas from readily available commercial breeders has been Nevilles Haze from Mr Nice Seeds , LaughingBuddha from Barney's Farm and Pineapple Punch from Flying Dutchman. The Nev's and the LB, I would recommend to anyone for indoor use. Both were very similar in growth habit , smell, taste and high to actual Thai brick bagseed sourced by me in Thailand. The Pineapple Punch had neither pineapple nor punch. The "soaring high" in the description must refer to its 14' height.
As far as obtaining "real" seed from" reputable" sources goes, get a passport if you don't already have one and go somewhere equatorial where weed grows wild or is readily available commercially. Nothing beats scoring a little seedy "mota" from some even seedier local whilst engaging in even seedier activity like attending an illegal lunar festival death match in a jungle somewhere in Cambodia. Collecting samples can sometimes be as surreal as smoking them.