Getting a ek1 (99-00) cxi you will eventually do the following: brake upgrade to ek4 or dc2r, power windows, cluster, mirrors depending on your taste. lip kit etc
ek1 gli (99-00) - most you will do is engine than upgrade brakes than lips etc

Ek4 I'm sure you mention you will do engine than facelift etc, brakes and lip kit.

It all comes down to your budget.