Ignition Coil (Pack) Question!

[Seerlah]

I have a misfire in cylinder one and did the musical coil swap. It is def the ignition coil. But I read that you can improve gas mileage with new coilpacks. What are people's takes on coil packs? Would you recommend to replace all 4? And if so, would you spend the extra bucks on the upgraded Hitachi E (they have Beru "E", but not for AWM) coilpacks or just go with the OEM? Or simply just replace that one and call it a day?

The reason of this thread is about opinions on what route to take. I came across a thread on Plasma Booster coilpacks, but those things are $735 . I refuse to spend that much on ignition coils. Does anyone know of a better one to upgrade with other than the Hitachi E coilpacks?

*Links to cheapest places to purchase is always a helper

Thanks!

/thread: I just ordered a set of the R version for $98 shipped. I would have paid close to $50 more for the Hitachi E's after shipping costs. But my question is, is it ok for me to swap out an "R" version with an "L" version if needed? Thanks!