gt35r stageV T4 vs 3574 T4 vs gt35r T4?

[AchillesGr]

hi guys,
i searche the site and did not find any info about the stageV.
do anyone have a comment for the gt35r stage v?i am searching for a turbo for an fd.
if it is so good why there is no info here?
so far i am thinking the gt3574 ptrim and the stagev 1.00.
the above two versions are modified garrets.do anyone know what modifications they carry?i am asking because i am i Greece and i want to be easy to find a spare part and repair it.the third simple gt35r T4 option is the simplest but it is a modified too?

any suggestion or comments are welcome
thanks