"dro" is not a strain. therefore you wouldn't see it in the name of anything at a seed bank.

"dro" is short for hydroponic, which denotes a method of growing. It has nothing to do with the strain it is.

furthermore, if you've been confused by a friend or a dealer who's referred to a type of MJ as "so and so Dro", it's because either A.)it was grown hydroponically, or B.)someone along the line (usually the dealer) made the name up. (it's usually B).

If you're interested in growing using a hydroponic medium, then you should do some research in the hydroponic forums. Since you mention in your post that you're willing to spend good money on soil, then I'll venture to guess that you don't know much about hydroponics and how it works.

On the other hand, if you'd just like to try to grow some good mj indoors, start reading everything, and do the footwork necessary to learn everything you can about indoor gardening, and the plant you seek to cultivate. All the good equipment in the world is useless if you don't have the knowledge of how to properly use it. Good luck in your research!