I am looking into getting a SCT livewire or a Diablo Trinity. Does anyone have any experience with both or have any ideas if one is better than the other or are they about the same? Both come with custom tunes and free tuning for life if I go through American Muscle. Also is getting the unit through American Muscle worth the extra money to get the custom tunes as I could get the unit almost $150 cheaper off Ebay but they only have the distributers tunes.