Custom tune suggestions for upgrade!!!

[TBowman053]

Well after having the heads shaved .0015 and headers, and my CAI and lean codes constantly popping up I NEED TO UPGRADE MY EVO AND GET CUSTOM BABY!!!!! Im looking for an everyday performance tune and my question is can you pick up alot of gains the higher octane you go? I dont mind gettin 89 or 91 octane if it helps that much more. Im thinking thats all im going to need since i do not tow much and i dont see the need to get a 87 performance and a 93 performance i'd rather just get 91 or something like that! Thanks guys. Why i am here tho, if i were to get a tow tune... same question for about octane levels/gains... and will the custom tune tow be that much better than the canned since i dont tow that much?