5zigen has a new wheel out : It will be available up to 19x10
http://www.5zigenusa.com/english/products/wheel/proracer/ZR+520.html
very nice, but not sure of quality, never ran them. I was trying to get away from the deep dish, since i have had that look on last NSX/2 M3's...but love the GT-M, but thought "well if i find a bad ass 19x10/18x8 set up in VERY concave style like friends 996TT i might do it" so far the concave ones are "nice" but not "WOW" i gotta have them....and the concave not impressive considering we're talking 10" wide, i'd thought they have more effect to them..maybe im just old school and need to stick to 4" lips...