Yea, Lenso Muse.
Yes, they are heavy and you can feel the differance in performance, but that is also partly due to the larger rolling diamiter.
A year and a half ago i paid $3600 for the rims and Hankook silica tyres (F:245/35/19, R:275/30/19). These tyres are pretty damn good! Even Kevin, from driver dynamics (Driving instructor at the skid pan days), could not beleive the grip these tyres had on a wet and oiled surface. He was stuggling to do a half lap drift on the skid pan. The price also included ballance and a full alignment.