sarp fool
well basically with the 25 head u dont have that greater pick of cam's, as the std hydraulic lifter setup can only go so far in lift. (9.XXmm i think it is)
saying that, i'd prolly go with something around the 250-260deg and 8.5-9.15mm lift.
looking on greenline, tomei only do a poncam of 256deg duration & 8.50mm lift. hks do 256deg 8.8lift or a 260deg 9.0lift.
depends how big that turbo is, id go the bigger of the cams
however, if u were going take the head off and get it refreshed, u can easily get it converted to a solid lifter setup, then u can run a gtr cam, which u'd have a hell of a lot more option with cam selection