I've heard alot during the last time, that you should try to find matching openings, so that you won't have completely different openings with completely different ideas behind them, which would only give you less knowledge of the resulting positions. And this seems reasonable enough.

At the moment, I haven't really decided on any openings, I'm largely going with "classical" openings such as Spanish, semi-slav etc, but my knowledge on these lines are all shallow, and I usually just play logical moves and try to activate my material.

However, I'm now getting interested in starting to look into the openings, not focus my studying solely on it ofcourse, but start to look into them. The opening (defence) that has cought my interest the most, as black, is The Pirc, it seems to lead to dynamic games with both tactical and strategical positions, and it's something I want to give a try.

But, I have no idea what other defences and openings to use, I'm thinking the Slav/Semi-slav against 1.d4 and reversed Sicilian against 1. c4. But these are far from The Pirc, and I only play them since they seem logical. What other openings/defences would go well with the pirc, that are still reasonably sound?

Well, I'm not sure if this is what your looking for (and I've never played the Pirc) but Gambit had a book out something like Dangerous Opening Reperitoire for black... something like that that offers a comprehensive system with the Pirc at its core.

Um.. I would think openings like the Pirc, Accelerated Dragon, Modern and King's Indian are related enough for a reportoire.