Medium Thin Ride Cymbals
Of course, it's no secret that heavier cymbals deliver more sustain and volume, which begs the question of why use a lighter one in the first place? The answer is there are lots of situations where louder and more sustaining cymbals actually work against you: recording, for instance, as well as sound systems with sensitive mics, or ensembles with soft-spoken vocalists. You'll also get faster attack and a tighter response from lighter cymbals like these, and they still have the cutting power you need to make yourself heard.
With that said, not all medium-thin ride cymbals are created equal - so choosing the best ones for your setup is a very personal decision. You can get a sense for some extremes by comparing the Meinl Byzance Vintage Pure Light Ride Cymbal to the Zildjian A Series Sweet Ride Brilliant Finish. One looks almost like it was salvaged from a trash heap (and delivers a sound that is fittingly trashy), while the other is polished to a nearly mirrored shine. But they're both ride cymbals, and that gives you a sense for the variety you have to choose from. So don't hold back! Whether you like your cymbals gritty or shiny, there's definitely a medium-thin ride for you.