What are u planning on useing the car for? circuit/drift/daily driver?
Personally if it was a daily driver, a set of lowered springs, stiffer than standard. I use Eibach springs in my gz20, alot lower and reduced body roll a fair bit, still very comfortable, but certinaly not what id want on the track.
If it is going to go on the track, go for some coilovers, once again if ur getting coilovers u might as well spend the extra on adjustable tops to allow you to setup the suspension as desired.
Personally i wouldnt fit TEMS to TEIN's even if its possible, the hard - soft setting on tems certinally wouldnt match tein's EDFC system.