I like the white widow strain from Nirvana. Cheap and relatively easy to grow.

IMO: the harvest time creates the effect you want. A 'late' harvest produces the couchlock effect. A 'late harvest' is one where, a high % of the plants trichomes have turned amber.

An 'early' harvest produces a quick, buzzy high; that produces munchies. An early harvest has trichomes that are mostly clear and some cloudy. Only the grower can control this effect at harvest.

ex: