ALUMINUM S.B. PROMAXX HEADS ANY ONE USED THEM ?

I was looking at aluminum heads and came across these ProMaxx heads . The little bit of info that i found were people that just got them and loved them or shops getting ready to port them . They all say good things about them as out of the box head . one shop said that they were one of the best heads and port blends job on out of the box heads he had seen in there price range . Did not no if any one has try them jegs part #9362 also was looking at Speed Master 746-pce 281.2149 65cc 171 port and pce281-2148 68cc 190 port . ProMaxx $1,550
Speed master $1,100
Speed master 190 port $1,600
THANKS