I do not like the headlights or tails on the 350Z. Actually, without a body kit on it, it is kinda funny looking, but with a body kit on it looks awesome.
The Rx-8, also needs spoiler and such to make it sharp looking, it too is kinda boring in it's stock naked form. But, the low torque is what scares me as well. It's really low, like MAzdaspeed low. I also don't like the extra line that the rear doors make on the side of the rx-8, it breaks up the otherwise gorgeous lines of the side profile. I would love to see a 2 door version.
Either way, I would like to have both. I haven't even touched on interior's. But they both have good points, and bad points.