Modafinil has changed my life - I can't even explain how it helped me setup and complete projects. I would say he best way to word the feeling is 'clarity' when one is using this. Worth a try
I am 100% an unabashed fan of Provigil/modafinil. I think it should be available OTC. Even though I have a prescription, it's $30/dose to fill it in the states. I can buy it from India for ~$1/dose.