JZX100 is the ultimate. They've aged so so well, and I'd definitely like to build one.
I actually tried to buy a rare JDM import before getting the S14. 9 years ago I went through all the steps of buying a Legnum VR4, but being 19 no-one would insure me, so I had to "settle" for an S14.
I think most of the insurance issues arose because the majority of insurance companies didn't have Legnum VR4 in their systems, and they didn't want to take the chance on insuring a teenager on a mystery high-power import.
*random Google images photo