There's a big difference between 380 and 400 in swingweight, at least there is to me. I have four frames at 384 and two of Berdych's frames and I prefer to play with my current frames around 361. I've played many sets with the 384s and Berdych's frames and I find that the Berdych frames are a lot tougher to hit heavy topspin backhands without a ton of time. If you look at swingweights over 400, you have Murray and Soderling. Anyone else?
4 x IG Prestige MP, 70 cm, 376 grams, 386 SW, ALU Power @50