I think any strut car would benifit more than a Shock car since the upper mounts on a strut type car have more pressure excerted on them. No as stiff as the EP3/RSX chassis is it may not be the improvment it is for say a 85 golf but with your car geroge and the after market springs it probably would help some.

Padawan, on an street driven car with street able springs do realyl think strut tower bars every were are going to make that big of differnce, with the low spring rates that most people run on the street, adding bracing to these points are not going to accomplish much I am sure your butt dyno will say they are a hugh improvment, but of course that is where your wallet is also. When you start getting into spring rates above 1000 having bracing on the top of the struts may show more of an improvment than if not, however you ought to just get a cage/rollbar if you are that serious about your car.