Well, I don't know of 'audiophile' grade blinds, but if I were to get some I would chose some with soft surfaces as opposed to plastic or hard wood, and I would absolutely select vertical blinds unless you are going to operate with them fully closed during listening sessions. Cloth vertical blinds I would think would not only work but could easily gain decorator approval.
BTW, its not really that much of a crap shoot if you do some reasearh on the radiation patterns of the various speaker types you might choose from. They all create different sound fields and set up problems as well as sonic differences. Take your time! IMHO, though, and most generally speaking, the easiest speakers to set up are dynamic/cone based speakers. Panels and electrostats are the hardest and you have fewer options to get them to their optimum set up/sound.
BTW, its not really that much of a crap shoot if you do some reasearh on the radiation patterns of the various speaker types you might choose from. They all create different sound fields and set up problems as well as sonic differences. Take your time! IMHO, though, and most generally speaking, the easiest speakers to set up are dynamic/cone based speakers. Panels and electrostats are the hardest and you have fewer options to get them to their optimum set up/sound.