ive heard great stuff about isis...a little snag with their sr freddy manifold but supposedly thats been fixed.
great reviews on their short shifter, clutch line/power steering line, suspension arms,fpr etc etc.
im getting them for my s13 track slut. a buddy from work got them for his daily s14 and he says they are awesome...and he got them about 7 months ago,,,and took them on a trip to west virginia, tons of miles and took it on dragons tail and said they felt solid...i say get em
i usually say go with original quality parts but as far as quality their stuff is good