EC99, I'm pretty much the same size and riding style as you, and I have 390s on my SL-R. I didn't like the 390s at first, but they were poorly adjusted. After adjusting them properly, I like them a lot more, but I've only really done freeriding and some easy ground tricks with them so far. They do feel a bit soft compared to Burton Cartels (only other decent binding I've used), but they're definitely not unresponsive. This weekend I'll be hitting a lot of jumps and trying to learn 360s, so I'll let you know how how they work out for that.
There's a guy on here called Luckyboyee (or something to that effect) who has Targas and an SL-R, but I don't think he's tried them out yet.