I've owned a 99 SH myself and have driven numerous GS-R's too. I would choose the Prelude. Even my friends who are GS-R owners admit that the Prelude is an all around great car.

Stock, a Prelude is faster, higher trap speed and it's torque makes up for it's weight.

A lot of Prelude parts are rare and expensive, but if you got the money, it wouldn't cause the Prelude to be a bad candidate.