daily driving both my tuned turbo cars on e85 and love it - can't go back to 98ron
400+awkw is right where the r35 needs to be
also interested to hear from martin how the actuators went on stock turbo. consensus seems to be theres no point pushing the stock turbos any harder than stock actuators can handle (8psi springs iirc), but with hks now releasing their gt570/600 kit actuators it seems worth pursueing - especially if you're down there changing out the turbo inlets
http://r35tt.com/store/HKS-Actuator-Upgrade-Kit-09-R35-GT-R/
LC5 is definitely more aggressive, and it does improve shifts in auto mode by holding gears longer. I prefer to run launch with VDC in R mode rather than off as it controls wheelspin alot better, especially on a low grip surface