@quandary,
I'd like to disgree with you about Buddhism. You say you don't like arguing with Buddhists because it seems 'their argument would rely on a substratum of spirituality and religious beliefs rather than science (or at least a scientific means of proof).' This is a common view, but you'll find yourself arguing with a lot of Buddhists on this point whether you like it or not.
The Dalai Lama, who is aware of the issues, and aware of Popper's views (and met him), characterises Buddhism as a science of mind. It is a religion, a science, a practice and a metaphysical scheme, and may be approached from any of these directions. If you don't like the religion, try the metaphysics. In metaphysics it is possible to demonstrate the truth of its Middle Way doctrine, as Bradley and Nagarjuna have shown. Indeed, it is the only metaphysical position that cannot be refuted in the dialectic, and as such the only cosmological doctrine that is reasonable. No substratum of religious beliefs is necessary to establish this.
Consciousness studies as it is at present might be seen as a communal attempt to falsify Buddhist doctrine regarding consciousness, and it isn't going very well. David Chalmers is one of the very few prominent names who seem prepared to face the issues head on, and he ends with a view just one small step from the Buddha's. But even Dennett, the foremost muddler of issues in the field, comes close with his dismissal of the self as a work of fiction and his rejection of dualism. Unfortunately these people seem convinced that Buddhism, more generally mysticism, is dependent on religious beliefs that cannot be assesssed, and therefore don't bother to find out what it is. Please don't fall into this trap.