just to give you another perspective,i prefer the 5-speed,i think it has a better shift feel.one criticism of it initially was that the revs dropped too much on the 1-2 shift,the 95 at least partially fixed that with a lower 2nd gear ratio,as you can see in the changes by year.the targa is marginally less stiff,but most people say they'll never feel it unless it's tracked,and to me it's worth for that magic feeling on a nice day of being open to the sky.as for speed,it's only about 100 lb. heavier,which is from stiffening to the chassis.it's hard to feel that small a difference.
i agree with others,get a well-maintained one and enjoy it.