VA makes an awesome tune for the LLY. PPE had its ups and downs on my truck, but I hear they have improved their tunes 10 fold since I tried one. For a daily driver, the Predator 40hp tune was my favorite. The Edge was good, until it overheated and killed the truck. That sure sucked! These are my experiences on my 05 LLY. I got the end all tuning software with my purchase of EFI last December. If you have some time to experiment, EFI is the way to go. If not, pick one. They all have there positives and negatives. You need to choose one that fits your needs. Custom tuned ECM's are another great option. The hassle of switching ECM's and postal fees concern some, but that is part of the deal. Look around. You will find something that fits your needs. As far as one being better than the other, that is all a matter of opinion. From a Hypertech to a custom made tune from Steve Cole, there is something for everyone.