I had a really good deal on a 08 completely stock 6.4l fall into my lap and I'm trying to decide if its worth selling my 6.0l (thats done) to start over. Im trying to get a parts/price list I would need for the 08 to help decide. Anyway, finally to my question. How much differnece is there between spartan, h&s, and a sct livewire with custom tunes. I'm looking for good smooth power (no light switch), no/low smoke, and good shifting. It would be my DD. Upgrades would be possibly deletes, tuner, exhaust, cai, and maybe upgraded cold side cac tube. looking for around 500rwhp as reliable and driveable as possible. Also is h&s the only one that can adjust for tpms? I know I would have to find an older device to keep the deletes an option. If I'm missing some "necessary" upgrades please let me know. Sorry for the long post and thanks in advance. I tried searching but couldnt find anywhere comparing the 3, just info on each individual device.