Do your homework on the Holley and MS. I run an MS3X on an LA engine. Their new AMP EFI controllers seem like much better packaging than previous products. The capability is certainly available on the MS, but it does have a big learning curve if you haven't messed with tuner studio. Holley's software seems more intuitive and their digital displays are really nice. There are displays available that work with MS via CAN bus, but I don't know if they are plug and play. From a price prospective, I think the terminator X is more in line with MS products. When they only had the dominator product, it made sense to go with MS.