Question for the hatchback owners because I know you all face the same problem.

My Del Sol gets way too loose around curves. I have it slammed with Weapon R coilovers. I do not have a wing or spoiler so I need something to keep my rear end in order. Do rear upper and lower strut bars really work? I am planning on buying either Neuspeed or Skunk2 rear lower strut bars. Supposedly there are no upper rear strut bars but I believe the one for the 92-95 hatchbacks will work for my car. Which one will yield more restraint on the rear end-the upper rear or lower rear strut bar? All replies are appreciated.