I disagree, if you have a motor and a cheap tidy shell why not, if you dont like getting your hands dirty then sure buy an STI,
Honestly there isnt a great deal of difference between the shells and if you plan on modding it, your better starting with the cheapest option possible because nothing that came out in that era is up the task, if your looking at turning a profit on it i think you will struggle, but if you want a fun project car then this is it for sure!