I got the special edition Road and Track magazine just for the RX8 and they did feature a MazdaSpeed model that looked so beautiful I started crunching numbers again. They said that 300 bhp was a good estimation but they hope that number climbs. From what the article said the Renesis engine can be either Turbocharged OR Supercharged. They didn't give an dates but I would think 2005 would be a good guess especially if they plan on reintroducing the RX7 in 2006/7.