I'm not saying I'm a complete source addict, either. Some times some ESiR/CtrlHD encodes are transparent, and I will always grab those, a nice 30gb difference that can be used for another movie. However, most of the time they aren't, and for sources, any tracker or NZB is good enough.
You don't need to get into an HD tracker just to get good quality media. If you're looking for quality alone, definitely don't look into trackers at all, it will be a massive waste of time, and most of the time your ratio will take a hit every time you download a source (30+gbs and those aren't even for big movies/releases).