Cheese is originally a UK strain i think, maybe if you ask around in the UK thread those people may know which is the best available these days, i was lucky to score Big Buddha Seeds Original UK Cheese in regular seed form when it was first released about 10-15yrs ago, i outcrossed it, was some killer shit for sure, outcrossed it again last year, shit is still really good even though getting watered down through successive outcrosses, get it if you can, you wont regret the Original Cheese
*Hazeman Seeds has an Cheese BX...might be worth a look there too?