I tested the NYC diesel about 6 months ago, it was the finest out of 4 diferent strains (californian orange, ppp, unknown small indica and NYC diesel). The diesel was the 3rd best yielder but best quality looker and grew rly good all the way without any problems by 2 newbs doing their second and first serious grow. The diesel had defenetly the hardest punch, best aroma and so on. its quite heavy so to speak. If i had to do pick a strain out of those 4 today and grow a room full of plants i'd pick the Diesel again for sure. Should add that my diesel seeds (feminized) came from high-supplies and not nirvana but since nirvana is a better store i guess that would only make it better then the ones i had.
Good luck to ya and if i can pinch in one more thing i would pick feminized wonder woman from nirvana if i had to pick any strain from any seed-shop. It looks fantastic and gotten so many good reviews.