I'd have to agree with the majority of Michaels thoughts. The Z is a good 'canvas'. Reading between the lines... YOU are the painter. YOU are the creator. YOU have to do the work. YOU have to spend 116 hours to figure out which sound deadening material provides the desired effect, without the weight penalty, because you know, if you gain much weight, you may as well have bought a heavy car that will survive (more importantly, you'll survive) a sizable impact. Were talking about ONE issue among hundreds.
The cars that are done WELL (in my opinion) are done by people that have literally built a car from scratch. They have thought about the details. THIS is where its at. Anybody can spend money on catalog parts. Anybody can fit them to any car.
The people that assemble a car worth driving are ARTISTS.
If you're into determination, education, expression, and 'The Experience', then a "Hybrid Z" is justifiable.
If you want lap times 'for the dollar' then choose another car.
...then again, I could be wrong.