What ever you can get for the best price I reckon, Wolf, Haltech (aside from my personal vendetta) Adaptronic, Vipec, Motec ect are all top line ECUs and will do the job.
Infact Haltech CLAIM that their ECU handles the timing Jitter issue better than the others, and there appears to be some evidence supporting it. Perhaps you could give Haltech a go (cant beleive I said that) on the normal CAS and if you experience an issue go to the crank trigger?