Interesting. When I was first building my car and planning to use a 727 behind my 360, all I heard was "don't use the 727, use the 904, it will be better all the way around".
I had never had any luck with 904's holding up on the street, but I went ahead and got a core and built the 904. I still have my small block 727 core, the 904 is holding up okay for now, but if it goes the 727 is going in there.