AVCR is a beast of a controller, i used a full afternoon and a tank to set one up on my old GT haha. The e01 is ment to be equally as good and can also link up to an EMB.
If you can get your hands on a 5zigen 304 border then thats a fuckin mint system. With the midbox removed and TD04 power it sounded unreal !! Quite raspy. The backbox is quite descrete and small looking, not stupidly big like a Nur spec.
I have another car as a daily but when mines is done it'll be getting used as much as possible lol. Would like to see a decent size full system on one if these though