well, a hardtop is different than the NAS softop which by all accounts a bad leaker. I'm surprised how dry things are in the 90. More so than the SIII was in HT form. Even in the worst of conditions though I've only ever had water on the floor and maybe a little on the upper dash pad in the SIII. Sounds like you need to re-read the water ingress manual...
I've always liked the open look.